Office 365 Education

Microsoft Office 365 is available in a variety of plans to best meet the needs of your organization. If you're looking for the differences between the Office 365 education plans, this article will show you which features are included in each of them. Office 365 combines the familiar Microsoft Office desktop suite with cloud-based versions of Microsoft's next-generation communications and collaboration services—including Microsoft Exchange Online, Microsoft SharePoint Online, Office for the web, and Microsoft Skype for Business Online—to help users be productive from virtually anywhere through the internet.

This article lists the features for Office 365 education plans (A1, A3, and A5). To compare features across business and enterprise plans, see Compare Office 365 for Business plans or, for a more detailed list of features, see the relevant service description under Microsoft 365 and Office 365 service descriptions.

To search for support articles and information, see Office Help & Training.

Service availability for each plan

Each Office 365 education plan includes a number of individual services, such as Exchange Online and SharePoint Online. The following table shows the services that are available in each Office 365 plan.

Service Office 365 A1 Office 365 A3 Office 365 A53
Office 365 platform Yes Yes Yes
Exchange Online Yes5 Yes4 Yes4
SharePoint Online Yes Yes Yes
OneDrive for Business Yes Yes Yes
Skype for Business Online Yes7 Yes6 Yes6
Office for the web Yes Yes Yes
Office applications No Yes Yes
Project No1 No1 No1
Power BI No No Yes
Yammer Academic Yes Yes Yes
Azure Information Protection2 Yes Yes Yes

Note

1 Microsoft Project is not included in Office 365 but can be acquired separately. Project Online Essentials is free. If you are a student or an educational institution, you may be eligible to purchase Project Plan 3 and Plan 5 at educational prices.
2 To learn more about which Azure Information Protection features are included with Office 365 plans, see Azure Information Protection.
3 Office 365 A5 contains Phone System, Audio Conferencing, and Calling Plan capabilities. To implement Calling Plan requires an additional plan purchase (either Domestic Calling Plan or International Calling Plan).
4 Includes Exchange Online Plan 2.
5 Includes Exchange Online Plan 1 plus supplemental features.
6 Includes Skype for Business Online Plan 2.
7 Includes Skype for Business Online Plan 1 plus supplemental features.

System requirements

For system requirements for Office 365, please see Office 365 system requirements.

Service Level Agreement

For information about Service Level Agreements, see Service Level Agreement. For information about recent uptimes for Office 365, see Recent worldwide uptimes.

Platform features

The following table lists all platform features that are available across Office 365 education plans. For specific information about pricing and features in the plan, see Office 365 Education plans.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Office 365 administration
Administer Office 365 by using the Microsoft 365 admin center or Windows PowerShell Yes Yes Yes
Protect content by using Azure Information Protection Yes Yes Yes
Office 365 suite features Office 365 A1 Office 365 A3 Office 365 A5
Microsoft Bookings No Yes Yes
Microsoft Briefing email10 Yes Yes Yes
Microsoft Power Automate Yes Yes Yes
Microsoft Forms Yes Yes Yes
Microsoft Graph API Yes Yes Yes
Microsoft MyAnalytics9 No Yes Yes
Microsoft Planner Yes Yes Yes
Microsoft PowerApps Yes Yes Yes
Microsoft StaffHub Yes Yes Yes
Microsoft Stream8 Yes Yes Yes
Microsoft Sway Yes6 Yes6 Yes6
Microsoft Teams Yes Yes Yes
Office Delve Yes Yes Yes
Office 365 Groups Yes Yes Yes
Office 365 Video Yes Yes Yes
OneNote Class Notebook Yes Yes Yes
User account management Office 365 A1 Office 365 A3 Office 365 A5
Cloud identity, Federated identity, or Multi-factor authentication Yes Yes Yes
Office 365 desktop setup Yes Yes Yes
Bulk upload Using .csv files Yes Yes Yes
Directory Sync tool Yes Yes Yes
Exchange simple (cutover) migration Yes Yes Yes
Delete accounts and reset user passwords from Office 365 or by using Windows PowerShell2 Yes Yes Yes
Users can change their own password3 Yes Yes Yes
Manage licenses4 Yes Yes Yes
Manage security groups from Office 365 Yes Yes Yes
Multiple administrator roles available Yes Yes Yes
Allow a partner to administer Office 365 for you Yes Yes Yes
Azure Active Directory services Yes Yes Yes
Domains Office 365 A1 Office 365 A3 Office 365 A5
Add custom 2nd-level domains, like fourthcoffee.com Yes Yes Yes
Add custom 3rd-level domains, like marketing.fourthcoffee.com Yes Yes Yes
Add up to 900 custom domains Yes Yes Yes
DNS records managed by Office 365 (full redelegation) Yes Yes Yes
DNS records managed at your DNS hosting provider (partial redelegation) Yes Yes Yes
Use name.onmicrosoft.com domain or a custom domain name for email addresses and Skype for Business Online Yes Yes Yes
Use name.sharepoint.com for your team site Yes Yes Yes
Use a custom domain name for your team site No No No
Host a public website with a different provider Yes Yes Yes
Use a different provider for email and IM Yes Yes Yes
Domain ownership verification required for custom domains Yes Yes Yes
Automated domain purchase and domain verification available for domains purchased through Go Daddy Yes Yes Yes
Service health and continuity Office 365 A1 Office 365 A3 Office 365 A5
Status information available on the Service health or Service status page Yes Yes Yes
Status of individual alerts available on the Microsoft 365 admin center dashboard Yes Yes Yes
Service health RSS feed Yes Yes Yes
Reports Office 365 A1 Office 365 A3 Office 365 A5
Active and inactive mailboxes Yes Yes Yes
New and deleted mailboxes Yes Yes Yes
New and deleted groups Yes Yes Yes
Mailbox usage Yes Yes Yes
Types of mailbox connections Yes Yes Yes
Sent and received mail Yes Yes Yes
Top senders and recipients Yes Yes Yes
Spam detections Yes Yes Yes
Malware detections Yes Yes Yes
Top malware for mail Yes Yes Yes
Rule matches for mail Yes Yes Yes
Top rule matches for mail Yes Yes Yes
Top DLP policy matches for mail Yes Yes Yes
DLP policy matches by severity for mail Yes Yes Yes
DLP policy matches, overrides, and false positives for mail Yes Yes Yes
Top DLP rule matches for mail Yes Yes Yes
IM and audio sessions Yes Yes Yes
Application sharing, web, and dial-in conferences Yes Yes Yes
Video, application sharing, and file transfer sessions Yes Yes Yes
IM and audio/video conferences Yes Yes Yes
Downloadable mail protection reports Yes Yes Yes
Browser used Yes Yes Yes
Operating system used Yes Yes Yes
Create your own reports using Microsoft 365 reporting web services Yes Yes Yes
Service updates Office 365 A1 Office 365 A3 Office 365 A5
Regular updates provided to all customers Yes Yes Yes
Notifications sent to Message Center when action is required Yes Yes Yes
Roadmap.office.com for some service updates Yes Yes Yes
Option to turn on Targeted release Yes Yes Yes
Help and training Office 365 A1 Office 365 A3 Office 365 A5
Online help Yes Yes Yes
Community Yes Yes Yes
Other self-help resources Yes Yes Yes
Self-paced training Yes Yes Yes
Networking Office 365 A1 Office 365 A3 Office 365 A5
IPv4 and IPv6 protocols Yes Yes Yes
Trust Office 365 A1 Office 365 A3 Office 365 A5
Privacy, security, and transparency Yes Yes Yes
Advanced Security Management No Yes Yes
Microsoft Defender for Office 365 No No Yes
Customer Lockbox No No Yes
Advanced eDiscovery7 No No Yes
Secure Score5 Yes Yes Yes
Threat Intelligence No No Yes
Compliance
SAS 70 / SSAE16 Assessments Yes Yes Yes
ISO 27001 certified Yes Yes Yes
EU Model Clauses Yes Yes Yes
EU Safe Harbor Yes Yes Yes
HIPAA-Business Associate Agreement Yes Yes Yes
FISMA Authority to Operate Yes Yes Yes
Microsoft Data Processing Agreement Yes Yes Yes
PCI-governed PAN data No No No
Service continuity
BlackBerry Office 365 A1 Office 365 A3 Office 365 A5
Use BlackBerry Internet Service (BIS) Yes Yes Yes
Partners
Create trial invitations and purchase orders for a customer who is using the specified plan Yes Yes Yes
Provide delegated administration Yes Yes Yes
Service Level Agreement Yes Yes Yes
Product use rights Yes Yes Yes

Note

1 Office 365 does not provide support for any operating system that is not supported by its manufacturer.
2 If using directory synchronization with a local Active Directory, you must delete accounts or change passwords by using the local Active Directory, rather than the Office 365 portal or by using the Azure Active Directory module for Windows PowerShell.
3 To learn how to set self-service password management policies for users, see Manage Passwords in Azure AD.
4 Reducing seats that were purchased with a term discount may be subject to an early termination fee. This is not applicable for subscriptions paid on a monthly basis.
5 Available at https://securescore.office.com (link requires admin permissions). For more information, see Introducing the Office 365 Secure Score.
6 Microsoft Sway is not currently available for customers in certain geographies. Some legacy Office 365 plans that are no longer in market as of August 2015 may also not have access to Microsoft Sway.
7 Advanced eDiscovery is supported in the United States and in the Western Europe (Netherlands) region. (Customer data from Canada and Asia Pacific is exported to the United States. Customer data from Europe, the Middle East, and Africa is exported to Western Europe [Netherlands].)
8 For information about Microsoft Stream features included in each plan, see the Stream licensing overview.
9 For more information, see MyAnalytics plans and environments.
10 The Briefing email is provided automatically to all users of Exchange Online. For more information, see Configure the Briefing email.

Security & Compliance Center features

The Security & Compliance Center is designed to help you manage compliance features across Office 365 for your organization. Links to existing SharePoint and Exchange compliance features bring together compliance capabilities across Office 365.

Note

Currently, many of the compliance features are still accessible through service-specific management interfaces, such as the Exchange admin center (EAC). However, this will change in the future as more service-independent compliance features are added to the Security & Compliance Center.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Access to the Security & Compliance Center Yes Yes Yes
Advanced Security Management No Yes Yes
Threat management, such as mail filtering and anti-malware Yes Yes Yes
Advanced threat management, such as threat explorer for phishing campaigns 5 No No Yes
Customer Lockbox No No Yes
Mobile device management Yes Yes Yes
Data loss prevention Yes Yes Yes
Data governance1 Yes Yes Yes
Advanced data governance2 No No Yes
Content search Yes Yes Yes
eDiscovery cases Yes Yes Yes
eDiscovery export Yes Yes Yes
eDiscovery holds (including query-based eDiscovery holds) Yes Yes Yes
Advanced eDiscovery4 No No Yes
Archiving3 Yes Yes Yes
Manual retention/deletion policies Yes Yes Yes
Unified auditing6 Yes Yes Yes

Note

1 Data governance lets users create, publish, and manually apply labels to documents; import data using drive shipping or over the network; and create and apply retention/deletion policies across workloads, users, and groups. Retention policies applied to mailboxes require Office 365 Enterprise E3 or E5.
2 Advanced data governance allows you to retain important information and delete unimportant information by classifying information based on a retention or deletion policy or both. It includes intelligent/automated actions such as recommending policies; automatically applying labels to data; applying labels based on sensitive data types or queries; and use of smart import filters. It also includes the Supervision feature for reviewing employee communications for security and compliance purposes.
3 Up to 1.5 TB of archive storage space.
4 Advanced eDiscovery is supported in the United States and in the Western Europe (Netherlands) region. (Customer data from Canada and Asia Pacific is exported to the United States. Customer data from Europe, the Middle East, and Africa is exported to Western Europe [Netherlands].)
5 Microsoft Defender for Office 365 is available in Office 365 A5 and as a standalone service for Office 365 A1 and Office 365 A3.
6 You can also use the Office 365 Management Activity API to retrieve events from the unified audit log.

Office application features

Use the following table to compare feature availability across Office 365 education plans.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Microsoft Word No3, 4 Yes Yes
Microsoft Excel No3, 4 Yes Yes
Microsoft PowerPoint No3, 4 Yes Yes
Microsoft OneNote Yes Yes Yes
Microsoft Outlook No3 Yes Yes
Microsoft Publisher No3 Yes Yes
Microsoft Access No3 Yes Yes
Skype for Business Yes2 Yes Yes
Microsoft InfoPath No3 Yes Yes
Windows 10 Apps No3 Yes Yes
Office for Mac for Office 365 No3 Yes Yes
Office Mobile for iPad/iPhone Yes3 Yes Yes
Office Mobile for Android Yes3 Yes Yes
Office Mobile for Windows Phone Yes3 Yes Yes
Office Mobile for Windows Phone Yes3 Yes Yes
Outlook for Android Yes3 Yes Yes
Enterprise value Office 365 A1 Office 365 A3 Office 365 A5
5 installs per user on PC or Mac No3 Yes Yes
Automated user account provisioning Yes Yes Yes
Multilingual user interface No Yes Yes
Client push deployment No Yes Yes
Client support for on-premises Exchange No Yes Yes
Client support for on-premises SharePoint No Yes Yes
Control of software updates No Yes Yes
Database Compare No Yes Yes
Desktop virtualization No Yes Yes
Excel Spreadsheet Compare No Yes Yes
Excel Spreadsheet Inquire No Yes Yes
Exchange Online and SharePoint Online Archiving and Compliance Yes Yes Yes
Group Policy support No Yes Yes
Information Rights Management using Azure Information Protection Yes Yes Yes
Information Rights Management using Windows Server AD RMS Yes1 Yes1 Yes1
Office Add-in, ActiveX, and BHO support No Yes Yes
OneNote client access to notebooks on SharePoint Server, SharePoint Online, OneDrive for Business, and Office 365 No Yes Yes
Office Telemetry No Yes Yes
Offline support for client applications No Yes Yes
Power Map for Excel No Yes Yes
Power Pivot for Excel No Yes Yes
Power Query for Excel No Yes Yes
Power View for Excel No Yes Yes
Roaming settings No Yes Yes
Shared computer activation No Yes Yes
Support for blocking cloud-based file storage No Yes Yes
Tap to find and reuse content No Yes Yes
Version upgrades No Yes Yes
Volume activation (KMS/MAK) No No No

Note

1 Windows Server AD RMS is an on-premises server that must be purchased and managed separately in order to enable the supported IRM features.
2 Skype for Business Basic is available for all customers. The Skype for Business desktop client is a locally installed application that provides presence, instant messaging, and conferencing features for Office 365 plans that include Skype for Business Online. Microsoft 365 Apps for enterprise, and Office 365 Enterprise E3 include the full Skype application, which includes additional features including advanced telephony support, archiving, and compliance features. A Skype for Business Online license must be assigned for each user. For more information on Lync Basic features, see Desktop client comparison tables.
3 Some schools are eligible for Education Plus, which includes Microsoft 365 Apps for enterprise, and allows students, faculty and staff to install the latest version of Office on up to five PC or Mac computers and on other mobile devices, including Windows tablets and the iPad. Schools qualify for Office 365 Education Plus when they license Office institution-wide for faculty and staff through Enrollment for Education Solutions, Open Value Subscription Education Solutions, or a school contract. Note that Access and Publisher are available on PCs only. OneNote for Mac is available as a separate download from the Mac App Store.
4 Office for the web versions are included. For more information, see Office for the web features

Office for the web features

The following table provides links to comparisons of Office for the web feature capabilities available in Office 365 education plans to feature-rich Microsoft Office desktop apps. Use the comparisons to discover what features are available in Office for the web and then select the feature name to read a brief description about how that feature works. You may discover that some people in your organization may need the advanced charting capability of the Excel desktop app while others may only need to view and lightly edit Word documents and PowerPoint presentations with Office for the web.

Note

  • A limited selection of Office features has been chosen to represent the advanced capabilities of the Office desktop suite.
  • The tables are not a comprehensive list of Microsoft Office features.
  • Microsoft Microsoft 365 Apps for enterprise is a monthly subscription offer of the latest Office desktop suite.
  • Microsoft Office Online Server on-premises customers get an Office for the web editing license if they have purchased an Office desktop suite license (such as an Office Professional Plus, Office Standard, or Microsoft 365 Apps for enterprise license).
Application Office for the web Link to detailed feature comparison
Word Word for the web Word
Excel Excel for the web Excel
OneNote OneNote for the web OneNote
PowerPoint PowerPoint for the web PowerPoint
Visio Visio for the web Visio

Exchange Online features

The following table lists the Exchange Online features that are available across Office 365 education plans.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Planning and deployment
Hybrid deployment supported Yes Yes Yes
IMAP migration supported Yes Yes Yes
Cutover migration supported Yes Yes Yes
Staged migration supported Yes Yes Yes
Permissions Office 365 A1 Office 365 A3 Office 365 A5
Role-based permissions Yes Yes Yes
Role groups Yes Yes Yes
Role assignment policies Yes Yes Yes
Message policy and compliance Office 365 A1 Office 365 A3 Office 365 A5
Archiving Exchange Online-based mailboxes Yes Yes Yes
Cloud-based archiving of on-premises mailboxes Yes Yes Yes
Messaging records management (MRM) retention tags and retention policies Yes Yes Yes
Encryption of data at rest (BitLocker) Yes Yes Yes
IRM using Azure Information Protection Yes Yes Yes
IRM using Windows Server AD RMS Yes1 Yes1 Yes1
Office 365 Message Encryption Yes Yes Yes
S/MIME Yes Yes Yes
In-Place Hold and Litigation Hold Yes Yes Yes
In-Place eDiscovery Yes8 Yes8 Yes8
Transport rules Yes2 Yes2 Yes2
Data loss prevention Yes Yes Yes
Journaling Yes Yes Yes
Anti-spam and anti-malware protection Office 365 A1 Office 365 A3 Office 365 A5
Built-in anti-spam protection Yes Yes Yes
Customize anti-spam policies Yes Yes Yes
Built-in anti-malware protection Yes3 Yes3 Yes3
Customize anti-malware policies Yes Yes Yes
Quarantine - administrator management Yes Yes Yes
Quarantine - end-user self-management Yes Yes Yes
Microsoft Defender for Office 365 No No Yes
Mail flow Office 365 A1 Office 365 A3 Office 365 A5
Custom routing of outbound mail Yes Yes Yes
Secure messaging with a trusted partner Yes Yes Yes
Conditional mail routing Yes Yes Yes
Adding a partner to an inbound safe list Yes Yes Yes
Hybrid email routing Yes Yes Yes
Recipients Office 365 A1 Office 365 A3 Office 365 A5
Capacity alerts Yes Yes Yes
Clutter Yes Yes Yes
MailTips Yes Yes Yes
Delegate access Yes Yes Yes
Inbox rules Yes Yes Yes
Connected accounts Yes5 Yes5 Yes5
Inactive mailboxes Yes Yes Yes
Offline address book Yes Yes Yes
Address book policies Yes Yes Yes
Hierarchical address book Yes Yes Yes
Address lists and Global Address List Yes6 Yes6 Yes6
Office 365 Groups Yes Yes Yes
Distribution groups Yes Yes Yes
External contacts (global) Yes Yes Yes
Universal contact card Yes Yes Yes
Contact linking with social networks Yes Yes Yes
Resource mailboxes Yes Yes Yes
Conference room management Yes Yes Yes
Out-of-office replies Yes Yes Yes
Calendar sharing Yes Yes Yes
Reporting features and troubleshooting tools Office 365 A1 Office 365 A3 Office 365 A5
Microsoft 365 admin center reports Yes Yes Yes
Excel reporting workbook Yes Yes Yes
Web services reports Yes Yes Yes
Message trace Yes Yes Yes
Auditing reports Yes Yes Yes
Unified Messaging reports No Yes Yes
Sharing and collaboration Office 365 A1 Office 365 A3 Office 365 A5
Federated sharing (Including Calendar Publishing) Yes Yes Yes
Site mailboxes Yes4 Yes4 Yes4
Public folders Yes Yes Yes
Clients and mobile devices Office 365 A1 Office 365 A3 Office 365 A5
Outlook for Windows 9 Yes Yes Yes
Outlook on the web9 Yes Yes Yes
Outlook for Mac9 Yes Yes Yes
Outlook for iOS and Android9 Yes Yes Yes
Exchange ActiveSync Yes Yes Yes
Mobile Device Management for Office 365 Yes Yes Yes
POP and IMAP Yes Yes Yes
SMTP Yes Yes Yes
EWS Application support Yes Yes Yes
Voice message services Office 365 A1 Office 365 A3 Office 365 A5
Voice mail No Yes Yes
Integration between voice mail and third-party FAX No Yes Yes
Third-party voice mail interoperability Yes Yes Yes
Skype for Business integration Yes Yes Yes
High availability and business continuity Office 365 A1 Office 365 A3 Office 365 A5
Mailbox replication at data centers Yes Yes Yes
Deleted mailbox recovery Yes Yes Yes
Deleted item recovery Yes Yes Yes
Single item recovery Yes Yes Yes
Interoperability, connectivity, and compatibility Office 365 A1 Office 365 A3 Office 365 A5
Skype for Business presence in OWA and Outlook Yes Yes Yes
SharePoint interoperability Yes Yes Yes
EWS connectivity support Yes Yes Yes
SMTP relay support Yes Yes Yes
Exchange Online setup and administration Office 365 A1 Office 365 A3 Office 365 A5
Microsoft Office 365 portal access Yes Yes Yes
Microsoft 365 admin center access Yes Yes Yes
Exchange admin center access Yes Yes Yes
Remote Windows PowerShell access Yes Yes Yes
ActiveSync policies for mobile devices Yes Yes Yes
Usage reporting Yes Yes Yes
Extending the service - customization, add-ins, and resources Office 365 A1 Office 365 A3 Office 365 A5
Outlook add-ins and Outlook MAPI Yes7 Yes7 Yes7

Note

1 Windows Server AD RMS is an on-premises server that must be purchased and managed separately in order to enable the supported IRM features.
2 Transport rules are made up of flexible criteria, which allow you to define conditions and exceptions, and actions to take based on the criteria. The available criteria and actions differ between Exchange Online, and Microsoft Exchange Server 2013. For a list of available criteria and actions, see the corresponding criteria and actions topics for each product.
3 Exchange Server 2013 uses only the Microsoft anti-malware engine. Exchange Online uses multiple anti-malware engines to scan inbound, outbound, and internal messages for malware.
4 SharePoint Online must be included in the subscription plan.
5 Connected accounts are supported for POP and IMAP accounts, but disabled for Outlook.com (Hotmail).
6 Using a cmdlet to work with the Address List and Global Address List is not supported.
7 Some third-party web parts and add-ins may not be available.
8 For eDiscovery, you need a separate query for on-premises vs. cloud.
9 Table indicates whether the client works with the associated plans. It does not mean the clients are necessarily included in the purchase of these plans.

Exchange Online limits

Find the Exchange Online limits for a variety of service areas, including address book limits, mailbox storage limits, and reporting and message trace limits, to name just a few.

Note

If you need assistance with a task or if you are troubleshooting a problem, you might find the following articles helpful:

The limits in Microsoft Exchange Online fall into one of the following categories:

Important

  • The limits applied to a Microsoft 365 organization may differ depending on how long the organization has been enrolled in the service. When a limit is changed in the Microsoft data centers, it can take some time to apply the change to all existing customers.
  • You can't modify most of these limits, but you and your users should be aware of them.
  • These limits apply to both internal and external recipients.
  • By default, Exchange Online Protection (EOP) protects Exchange Online mailboxes. For limits that apply to EOP features in Exchange Online, see Exchange Online Protection limits.
  • For information about Office 365 group limits, see "How do I manage my groups?" in Learn about Office 365 groups.

Address book limits

  • Address list limit - The maximum number of address lists that can be created in an Exchange Online or Exchange Server 2013 organization. This number includes the default address lists in Exchange Online, such as All Contacts and All Groups.

  • Offline address book limit - The maximum number of offline address books (OAB) that can be created in an Exchange Online or Exchange Server 2013 organization.

  • Address book policies limit - The maximum number of address book policies (ABP) that be created in an Exchange Online or Exchange Server 2013 organization.

  • Global address lists - The maximum number of global address lists (GAL) that be created in an Exchange Online or Exchange Server 2013 organization.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Address list limit 1000 1000 1000
Offline address book (OAB) limit 250 250 250
Address book policies (ABP) limit 250 250 250
Global address lists limit 250 250 250

Mailbox storage limits

The amount of mailbox storage available is determined by the mailbox type and the user's subscription license. Administrators can reduce maximum mailbox sizes per user or globally.

Note

Using journaling, transport rules, or auto-forwarding rules to copy messages to an Exchange Online mailbox for the purposes of archiving is not permitted. A user's archive mailbox is intended for just that user. Microsoft reserves the right to deny additional archive storage space in instances where a user's archive mailbox is used to store archive data for other users or in other cases of inappropriate use.

Feature Office 365 A1 Office 365 A3 Office 365 A5
User mailboxes 50 GB 100 GB 100 GB
Archive mailboxes6, 7 1.5 TB1 1.5 TB1 1.5 TB1
Shared mailboxes 50 GB2 50 GB2 50 GB2
Resource mailboxes 50 GB3 50 GB3 50 GB3
Site mailboxes4 50 GB 50 GB 50 GB
Public folder mailboxes 50 GB5 100 GB5 100 GB5
Group mailboxes 50 GB 50 GB 50 GB

Note

1 Each user initially receives 100 GB of storage in the archive mailbox. When auto-expanding archiving is turned on, additional storage is automatically added when the 100 GB storage capacity is reached. Additional storage space is added incrementally until the archive storage capacity reaches 1.5 TB. For more information, see Overview of auto-expanding archiving. See the Office 365 Roadmap for details about availability.
2 To access a shared mailbox, a user must have an Exchange Online license. Shared mailboxes don't require a separate license. However, if you want to enable In-Place Archive or put an In-Place Hold or a Litigation Hold on a shared mailbox, then an Exchange Online Plan 2 license or an Exchange Online Plan 1 with Exchange Online Archiving license is required. If you enable In-Place Archive and auto-expanding archiving for a shared mailbox, additional storage is automatically added when the 100 GB storage capacity for the archive mailbox is reached.
3 Resource mailboxes don't require a license.
4 Site mailboxes are created and managed in SharePoint Online. For more information, see Prepare for using site mailboxes in Office 365.
5 You are limited to 1000 public folder mailboxes, and the maximum total size of all public folder mailboxes is 50 TB.
6 In-Place Archive can only be used to archive mail for a single user or entity (such as a shared mailbox) for which a license has been applied. Using an In-Place Archive as a means of storing mail from multiple users or entities is prohibited. For example, an IT administrator can't create a shared mailbox and have users copy it (through the Cc or Bcc field, or through a transport rule) for the explicit purpose of archiving. Note that a shared mailbox that multiple people use does not actually store email for those individual users. Multiple users have access, and they send email as the shared mailbox. Therefore, the only emails stored in the shared mailbox are those sent to or from it, as the shared mailbox.
7 If you have created a retention policy in Exchange Online, messages will be automatically moved to a user's archive mailbox only if the user's primary mailbox is larger than 10 MB. The retention policy will not run automatically for mailboxes that are smaller than 10 MB.

Capacity alerts

Exchange Online provides three kinds of notifications when a user's mailbox is nearing, or at, capacity:

  • Warning - The user receives an email warning that the mailbox is approaching the maximum size limit. This warning is intended to encourage users to delete unwanted mail.

  • Prohibit Send - The user receives a prohibit-send notification email when the mailbox size limit is reached. The user cannot send new messages until enough email is deleted to bring the mailbox below the size limit.

  • Prohibit Send/Receive - Exchange Online rejects any incoming mail when the mailbox size limit is reached, and sends a non-delivery report (NDR) to the sender. The sender has the option to try resending the mail later. To receive messages again, the user must delete email until the mailbox is below the size limit.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Warning 49 GB 98 GB 98 GB
Prohibit Send 49.5 GB 99 GB 99 GB
Prohibit Send/Receive 50 GB 100 GB 100 GB

Mailbox folder limits

These limits are intended to limit mailboxes to known dimensions that can be supported in Exchange Online. The goal of these limits is to prevent an infinite number of mailbox items per folder, an infinite number of folders per mailbox, or an infinite number of public folders per Exchange Online organization. For practical purposes, mailbox folder limits are in effect unlimited and sufficient to support most Exchange Online mailboxes and on-premises mailboxes that are migrated to Exchange Online.

  • Maximum number of messages per mailbox folder - Specifies the maximum number of messages for a mailbox folder. New messages can't be delivered or saved in a folder when this limit is reached.

  • Warning for number of messages per mailbox folder - Specifies the number of messages that a mailbox folder can hold before Exchange Online sends a warning message to the mailbox owner. When this quota is reached, warning messages are sent once a day.

  • Maximum number of messages per folder in the Recoverable Items folder - Specifies the maximum number of messages that can be contained in each folder in the Recoverable Items folder. When a folder exceeds this limit, it can't store new messages. For example, if the Deletions folder in the Recoverable Items folder has exceeded the message count limit and the mailbox owner attempts to permanently delete items from their mailbox, the deletion will fail.

  • Warning for number of messages per folder in the Recoverable Items folder - Specifies the number of messages that each folder in the Recoverable Items folder can hold before Exchange Online logs an event to the application event log.

  • Maximum number of subfolders per mailbox folder - Specifies the maximum number of subfolders that can be created in a mailbox folder. The mailbox owner won't be able to create a new subfolder when this limit is reached.

  • Warning for number of subfolders per mailbox folder - Specifies the number of subfolders that can be created in a mailbox folder before Exchange Online sends a warning message to the mailbox owner. When this quota is reached, warning messages are sent once a day.

  • Maximum folder hierarchy depth - Specifies the maximum number of levels in the folder hierarchy of a mailbox. The mailbox owner won't be able to create another level in the folder hierarchy of the mailbox folder when this limit is reached.

  • Warning for folder hierarchy depth - Specifies the number of levels in the folder hierarchy of a mailbox folder that can be created before Exchange Online sends a warning message to the mailbox owner. When this quota is reached, warning messages are sent once a day.

  • Maximum number of public folders - Specifies the maximum number of public folders in the complete public folder hierarchy. When this limit is reached, existing public folders must be deleted before new public folders can be created.

  • Maximum number of subfolders per public folder - Specifies the maximum number of subfolders that can be created in a public folder. New subfolders can't be created in a public folder when this limit is reached.

  • Warning for number of subfolders per public folder - Specifies the number of subfolders that can be created in a public folder before Exchange Online sends a warning message to the folder owner. If no owner exists, warning messages are sent to users with Owner permissions. When this quota is reached, warning messages are sent once a day.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Maximum number of messages per mailbox folder 1 million 1 million 1 million
Warning for number of messages per mailbox folder 900,000 900,000 900,000
Maximum number of messages per folder in the Recoverable Items folder 3 million 3 million 3 million
Storage quota for Recoverable Items folder in primary mailbox (not on hold) 30 GB 30 GB 30 GB
Storage quota for Recoverable Items folder in primary mailbox (on hold) 100 GB 100 GB 100 GB
Storage quota for Recoverable Items folder in archive mailbox (not on hold) 1.5 TB1 1.5 TB1 1.5 TB1
Storage quota for Recoverable Items folder in archive mailbox (on hold) 1.5 TB1 1.5 TB1 1.5 TB1
Warning for number of messages per folder in the Recoverable Items folder 2.75 million 2.75 million 2.75 million
Maximum number of subfolders per mailbox folder 10,000 10,000 10,000
Warning for number of subfolders per mailbox folder 9000 9000 9000
Maximum folder hierarchy depth 300 300 300
Warning for folder hierarchy depth 250 250 250
Maximum number of public folders 250,000 250,000 250,000
Maximum number of subfolders per public folder 10,000 10,000 10,000
Warning for number of subfolders per public folder 9000 9000 9000

Note

1 You can send and receive up to 150 MB messages between users (where the message never leaves the Microsoft datacenters). Messages that are routed outside of the Microsoft datacenters are subject to an additional 33% translation encoding increase, in which case the maximum message size is 112 MB.

Message limits

  • Message size limit - Message size limits are necessary to prevent large messages from blocking delivery of other messages and affecting service performance for all users. These limits include attachments, and apply organization-wide to all messages (inbound, outbound, and internal). Messages larger than this limit will not be delivered, and the sender will receive a non-delivery report (NDR). While message size limits can be configured up, down, or on a per-user basis, administrators can also create transport rules to limit the maximum size of any individual attachment. To learn more, see Microsoft supports larger email messages.

    Note

    Some email clients may have lower message size limits or may limit the size of an individual file attachment to a value that is less than the Exchange Online message size limit.

  • Subject length limit - The maximum number of text characters allowed in the subject line of an email message.

  • File attachments limit - The maximum number of file attachments allowed in an email message. Even if the total size of all the file attachments doesn't violate the message size limit, there is still a limit on how many attachments are allowed in the message. This limit is controlled by the multipart message limit.

  • File attachment size limit - The maximum file size of a single attachment.

    Note

    This is the maximum file size of a single attachment. Individual client programs, including Outlook on the web, may limit the size of attachments below this maximum. Exchange ActiveSync does not implement attachment size limits on an individual attachment basis. The total size of all attachments to an Exchange ActiveSync message must be less than the message size limit.

  • Multipart message limit - The maximum number of message body parts that are allowed in a MIME multipart message. This limit also controls the maximum number of file attachments that are allowed in a message.

  • Embedded message depth limit - The maximum number of forwarded email messages that are allowed in an email message.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Message size limit - Outlook 150 MB1, 2 150 MB1, 2 150 MB1, 2
Message size limit - OWA 112 MB1, 3 112 MB1, 3 112 MB1, 3
Message size limit - Outlook for Mac 150 MB1, 2 150 MB1, 2 150 MB1, 2
Message size limit - migration 150 MB 4 150 MB 4 150 MB 4
Size limit for encrypted messages (for subscribers using Office 365 Message Encryption with new capabilities) 150 MB5 150 MB5 150 MB5
Size limit for encrypted messages (for subscribers using Office 365 Message Encryption legacy version) 25 MB5 25 MB5 25 MB5
Subject length limit 255 characters 255 characters 255 characters
File attachments limit 250 attachments 250 attachments 250 attachments
File attachment size limit - Outlook 150 MB 150 MB 150 MB
File attachment size limit - OWA 35 MB 35 MB 35 MB
File attachment size limit - Outlook for Mac 150 MB 150 MB 150 MB
Multipart message limit 250 parts 250 parts 250 parts
Embedded message depth limit 30 embedded messages 30 embedded messages 30 embedded messages

Note

1 Microsoft administrators can specify a custom limit between 1 MB and 150 MB. However, the size of message you can send or receive also depends on what your email client or solution supports. For more information about customizing the maximum allowed message size for your organization, see Microsoft supports larger email messages.
2 You can send and receive up to 150 MB messages between users (where the message never leaves the Microsoft datacenters). Messages that are routed outside of the Microsoft datacenters are subject to an additional 33% translation encoding increase, in which case the maximum message size is 112 MB.
3 OWA accounts for the possibility that your message may be subject to the 33% encoding increase and restricts the size of message you can send to 25% less than the configured setting. For example, if you customize your settings for a 100 MB maximum message size, you can send messages no larger than 75 MB.
4 The size of messages to be moved into Exchange Online are computed by Exchange Online. Versions of Exchange prior to Exchange Server 2013 may report a smaller item size. This limit applies to move based migrations using any supported Exchange Mailbox Replication Service. Other migration methods (Cutover, Staged, IMAP, PST) and other third-party tools are limited by the general message size limit.
5 For information about OME with new capabilities, see Set up new Office 365 Message Encryption capabilities built on top of Azure Information Protection.

Receiving and sending limits

Receiving and sending limits are applied to combat spam and mass-mailing worms or viruses. These limits help to protect the health of our systems and keep our users safe.

Receiving limits

Receiving limits apply to the number of messages that a user, group, or public folder can receive per hour. This applies for both messages received from the Internet and from on-premises servers. When the receiving limit has been exceeded, any emails sent to that mailbox will receive a non-delivery report stating that the mailbox has exceeded the maximum delivery threshold. After one hour, the limit will refresh and the mailbox will once again be able to receive messages.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Messages received 3600 messages per hour 3600 messages per hour 3600 messages per hour

Sending limits

Sending limits apply to the number of recipients, number of messages, and number of recipients per message that a user can send from their Exchange Online account.

Note

For distribution groups stored in an organization's address book, the group is counted as one recipient. For distribution groups stored in the Contacts folder of a mailbox, the members of the group are counted individually.

  • Recipient rate limit - To discourage the delivery of unsolicited bulk messages, Exchange Online has recipient limits that prevent users and applications from sending large volumes of email. These limits are applied per-user to all outbound and internal messages.

    Note

    Exchange Online customers who need to send legitimate bulk commercial email (for example, customer newsletters) should use third-party providers that specialize in these services.

  • Recipient limit - This is the maximum number of recipients allowed in the To:, Cc:, and Bcc: fields for a single email message.

    Note

    For the purposes of the recipient rate limit and the recipient limit, a distribution group that is stored in the organization's shared address book counts as one recipient. In a personal distribution list, each recipient is counted separately.

  • Message rate limit - Message rate limits determine how many messages a user can send from their Exchange Online account within a specified period of time. This limit helps prevent overconsumption of system resources by a single sender. If a user submits messages at a rate that exceeds the limit via SMTP client submission, the messages will be rejected and the client will need to retry.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Recipient rate limit 10,000 recipients per day 10,000 recipients per day 10,000 recipients per day
Recipient limit 500 recipients 500 recipients 500 recipients
Recipient proxy address limit 400 400 400
Message rate limit (SMTP client submission only) 30 messages per minute 30 messages per minute 30 messages per minute

Reporting and message trace limits

For reporting and message trace limits, see the "Reporting and message trace data availability and latency" section in Reporting and message trace in Exchange Online Protection.

Retention limits

These limits control the length of time that items in specific folders in the Inbox can be accessed.

  • Deleted Items folder retention period - The maximum number of days that items can remain in the Deleted Items folder before they're automatically removed.

  • Retention period for items removed from the Deleted Items folder - The maximum numbers of days that items removed from the Deleted Items folder are retained before they're permanently deleted.

  • Junk Email folder retention period - The maximum number of days that items can remain in the Junk Email folder before they're automatically removed.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Deleted Items folder retention period No limit1 No limit1 No limit1
Retention period for items removed from the Deleted Items folder 14 days1 14 days1 14 days1
Junk Email folder retention period 30 days 30 days 30 days

Note

1 This is the default limit. Administrators can change this value for their organization.

Distribution group limits

These limits apply to distribution groups in your organization's shared address book.

  • Maximum number of distribution group members - The total recipient count is determined after distribution group expansion.

  • Limit sending messages to large distribution groups - Distribution groups that contain the number of members specified by this limit must have delivery management or message approval options configured. Delivery management specifies a list of senders who are allowed to send messages to the distribution group. Message approval specifies one or more moderators who must approve all messages sent to the distribution group.

  • Maximum message size for large distribution groups - If a message is sent to 5,000 or more recipients, the message size can't exceed this limit. If the message size exceeds the limit, the message isn't delivered, and the sender receives a non-delivery report (NDR). The total recipient count is determined after distribution group expansion.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Maximum number of distribution group members1 100,000 members 100,000 members 100,000 members
Limit sending messages to large distribution group 5,000 or more members 5,000 or more members 5,000 or more members
Maximum message size for large distribution groups 2 MB 2 MB 2 MB
Maximum number of distribution group owners 10 10 10
Maximum number of groups a user can create 300,0002 300,0002 300,0002

Note

1 If you are using Azure Active Directory DirSync, the maximum number of distribution group members that you can synchronize from your on-premises Active Directory to Azure Active Directory is 15,000. If you are using Azure AD Connect, that number is 50,000.
2 This limit also applies to admins.

Journal, transport, and inbox rule limits

The following list includes limits that apply to journal rules, transport rules (also known as organization-wide rules), and limits that apply to Inbox rules. Inbox rules are set up by individual users and applied to messages sent and received by the individual user's mailbox.

  • Maximum number of journal rules - The maximum number of journal rules that can exist in the organization.

  • Maximum number of transport rules - The maximum number of rules that can exist in the organization.

  • Maximum size of an individual transport rule - The maximum number of characters that can be used in a single transport rule. The characters are used in the conditions, exceptions, and actions.

  • Character limit for all regular expressions used in all transport rules - The total number of characters used by all the regular expressions in all the transport rule conditions and exceptions in the organization. You can have a few rules that use long and complex regular expressions, or you can have many rules that use simple regular expressions.

  • Scanning limits for attachment content - The transport rule conditions let you examine the content of message attachments, but only the first 1 MB of the text extracted from an attachment is inspected. This 1 MB limit refers to the text extracted from the attachment, not to the file size of the attachment. For example, a 2 MB file may contain less than 1 MB of text, so all of the text would be inspected

  • Maximum number of recipients added to a message by all transport rules - When a message is acted on by different transport rules, only a finite number of recipients can be added to the message. After the limit is reached, any remaining recipients aren't added to the message. Also, distribution groups can't be added to a message by a transport rule.

  • Forwardee limit - The maximum number of recipients that can be configured for an inbox or transport rule with a redirecting action. If a rule is configured to redirect a message to more than this number of recipients, the rule won't be applied and any message that satisfies the rule condition won't be redirected to any of the recipients listed in the rule.

  • Number of times a message is redirected - The number of times a message will be redirected, forwarded, or replied to automatically based on Inbox rules. For example, User A has an Inbox rule that redirects messages to User B, based on the sender. User B has an Inbox rule that forwards messages to User C based on keywords in the subject line. If a message satisfies both of these conditions, the message is only sent to User B; it's not forwarded to User C because only one redirection is allowed. In this case, the message is dropped without sending a non-delivery report (NDR) to User B indicating that the message wasn't delivered to User C.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Maximum number of journal rules 50 rules 50 rules 50 rules
Maximum number of transport rules 300 rules 300 rules 300 rules
Maximum size of an individual transport rule 8 KB 8 KB 8 KB
Character limit for all regular expressions used in all transport rules 20 KB 20 KB 20 KB
Scanning limits for content of attachments 1 MB 1 MB 1 MB
Maximum number of recipients added to a message by all transport rules 100 recipients 100 recipients 100 recipients
Forwardee limit 10 recipients 10 recipients 10 recipients
Number of times a message is redirected 1 redirection 1 redirection 1 redirection

Moderation limits

These limits control the moderation settings that are used for message approval applied to distribution groups and transport rules.

  • Maximum size of the arbitration mailbox - If the arbitration mailbox exceeds this limit, messages that require moderation are returned to the sender in a non-delivery report (NDR).

  • Maximum number of moderators - The maximum number of moderators that you can assign to a single moderated distribution group or that can be added to a message using a single transport rule. Note that you can't specify a distribution group as a moderator.

  • Expiration for messages waiting for moderation - By default, a message waiting for moderation expires after two days. However, the processing of expired moderated messages runs every seven days. This means that a moderated message can expire at any time between two and nine days.

  • Maximum rate for expired moderation notification messages - This limit sets the maximum number of notification messages for expired moderated messages in a one-hour period. This limit is placed on each mailbox database in the datacenter.

    During periods of heavy usage, some senders may not receive notification messages for moderated messages that have expired. However, these notifications are still discoverable using delivery reports.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Maximum size of the arbitration mailbox 10 GB 10 GB 10 GB
Maximum number of moderators 10 moderators 10 moderators 10 moderators
Expiration for messages waiting for moderation 2 days 2 days 2 days
Maximum rate for expired moderation notification messages 300 expiration notifications per hour 300 expiration notifications per hour 300 expiration notifications per hour

Exchange ActiveSync limits

The following limits apply to Microsoft Exchange ActiveSync, a client protocol that synchronizes mailbox data between mobile devices and Exchange.

  • Exchange ActiveSync device limit - The maximum number of Exchange ActiveSync devices per mailbox.

  • Exchange ActiveSync device deletion limit - The maximum number of Exchange ActiveSync devices that an Exchange administrator can delete in a single month.

  • Exchange ActiveSync file attachment limit - The maximum size of a message file attachment that can be sent or received by an Exchange ActiveSync device.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Exchange ActiveSync device limit 100 100 100
Exchange ActiveSync device deletion limit 20 20 20
Exchange ActiveSync file attachment limit 25 MB 25 MB 25 MB

OneDrive for Business features

OneDrive for Business (formerly SkyDrive Pro) is personal online storage space in the cloud. Use it to store your work files across multiple devices with ease and security. Share your files with colleagues as needed, and edit Office documents together in real time with Office for the web. Sync files to your local computer using the OneDrive for Business sync app.

OneDrive for Business is included in SharePoint Online and can also be purchased as a standalone plan. The OneDrive for Business standalone option includes Office for the web. To learn more, see What is OneDrive for Business?.

System Requirements

The OneDrive for Business sync client has different system requirements than the OneDrive client. To learn more, see How to install the OneDrive for Business sync client.

OneDrive for Business limits

OneDrive for Business Plan 1 provides 1 TB of storage space per user.

The following qualifying plans provide unlimited OneDrive storage per user for subscriptions with at least five users. Microsoft will provide an initial 5 TB of storage space per user. Customers who want additional OneDrive storage can request it as needed by contacting Microsoft Support. Subscriptions with less than five users receive 1 TB of storage per user.

  • Office 365 A1

  • Office 365 A3

  • Office 365 A5

You cannot allocate more storage to a specific OneDrive user. However, you can lower the amount of storage that a user sees. If an Office 365 Enterprise F3 user needs more storage, then you'll need to upgrade to Office 365 Enterprise E1.

For information about file types that you can't add to OneDrive for Business, see Types of files that cannot be added to a list or library.

OneDrive for Business is included in SharePoint Online. To learn about additional limitations in SharePoint Online, such as site collection quotas, file upload limits, and storage limits, see SharePoint Online software boundaries and limits.

Subscription plans

OneDrive for Business Plan 2 is available for Office 365 A1, A3, and A5. To view the features available in the plan, see the OneDrive for Business service description.

SharePoint Online features

For information about SharePoint Online features, see the SharePoint Online service description.

SharePoint Online limits

The following table shows the SharePoint limits for each Office 365 education plan.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Storage1, 2 1 TB per organization plus 10 GB per license purchased3 1 TB per organization plus 10 GB per license purchased3 1 TB per organization plus 10 GB per license purchased3
Terms in store 200,000 200,000 200,000
Storage for site collections Up to 25 TB per site collection or group4 Up to 25 TB per site collection or group4 Up to 25 TB per site collection or group4
Site collections per tenant 500,000 per organization5 500,000 per organization5 500,000 per organization5
File upload limit 15 GB 15 GB 15 GB
Number of users 1- 500,0006 1- 500,0006 1- 500,0006

Note

1 You can purchase an unlimited amount of additional SharePoint Online storage. See Add storage space for your subscription.
2 We recommend monitoring the Recycle Bin and emptying it regularly. The storage space it uses is part of the organization's total file storage limit.
3 When you have a subscription and a SharePoint Online standalone plan, the storage amounts are added.
4 SharePoint Online administrators can set storage use limits for site collections and sites.
5 Not including the OneDrive for Business site collections created for each licensed user.
6 If you have more than 500,000 users, please contact a Microsoft representative.

Skype for Business Online features

The following table lists Skype for Business Online features that are available for each Office 365 education plan.

Note

This table indicates client and service availability across Office 365 education options. If you want to compare individual features among the various Skype for Business desktop clients, web clients, and mobile clients, see Skype for Business Online client comparison tables and Mobile Client comparison tables.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Clients for Skype for Business Online
Skype for Business Full No Yes Yes
Skype for Business Basic Yes1 No No
Lync 2013 Basic Yes1 No No
Skype for Business Windows Store app Yes Yes Yes
Lync for Mac 2011 Yes Yes Yes
Skype for Business mobile clients Yes Yes Yes
Skype for Business Web App Yes Yes Yes
Instant messaging, presence, and contacts Office 365 A1 Office 365 A3 Office 365 A5
PC-to-PC IM and presence Yes Yes Yes
Multiparty IM and presence Yes Yes Yes
Contact card configuration Yes Yes Yes
My Picture configuration Yes Yes Yes
My Picture: URL photo experience No No No
Contact list configuration Yes Yes Yes
Unified contact store Yes Yes Yes
Address book search Yes Yes Yes
Distribution list expansion Yes Yes Yes
Persistent chat No No No
Photos of sender/receiver Yes Yes Yes
Skype-to-Skype audio, video, and media Office 365 A1 Office 365 A3 Office 365 A5
Desktop sharing over video-based screen sharing (VbSS) Yes Yes Yes
Desktop and application sharing over Remote Desktop Protocol (RDP) Yes Yes Yes
File transfers Yes Yes Yes
Video Yes Yes Yes
Network Quality of Service (QoS) - Differentiated Services Code Point (DSCP) No No No
Federation and public IM connectivity Office 365 A1 Office 365 A3 Office 365 A5
Office Communications Server 2007 R2 and Lync Server 2010 (IM, Presence, Audio, Video, Conferencing) Yes Yes Yes
XMPP (used by Google Talk, for example) and Sametime federation No No No
Skype federation Yes Yes Yes
AOL and Yahoo! federation No No No
Skype for Business Online meetings Office 365 A1 Office 365 A3 Office 365 A5
Ad hoc and schedule audio conferencing Yes Yes Yes
Ad hoc and schedule video conferencing Yes Yes Yes
Active speaker video Yes Yes Yes
H.264 encoding and decoding Yes Yes Yes
Multiparty video Yes Yes Yes
High definition video or pictures of all attendees Yes Yes Yes
Presenter controls Yes Yes Yes
Participant selected view Yes Yes Yes
OneNote sharing Yes Yes Yes
Ad hoc and schedule web conferencing Yes Yes Yes
Skype for Business meeting dial-in via audio conferencing (first party) No No Yes
Skype for Business meeting dial-in via certified audio conferencing provider (ACP) Yes Yes Yes
PowerPoint sharing Yes Yes Yes
File transfer Yes Yes Yes
Whiteboard and annotations Yes Yes Yes
PowerPoint upload Yes Yes Yes
Polling Yes Yes Yes
Client-side recording and playback Yes Yes Yes
Server-side recording and playback No No No
Meeting lobby Yes Yes Yes
Skype Meeting Broadcast No Yes Yes
Guest access to Skype meetings with Skype for Business Web App Yes Yes Yes
Schedule Skype for Business meetings in Outlook Yes Yes Yes
Schedule Skype for Business meetings in Outlook on behalf of others (Delegation) Yes Yes Yes
Schedule Skype for Business meetings with Web Scheduler Yes Yes Yes
Schedule online meetings in Outlook on the web Yes Yes Yes
Outlook delegation for scheduling meetings Yes Yes Yes
Create public meetings with static meeting IDs from Outlook No No No
Voice calling Office 365 A1 Office 365 A3 Office 365 A5
Auto attendants No No Yes
Busy options No No No
Branch office survivability No No No
Call admission control No No No
Call answer/initiate Yes Yes Yes
Call delegation No No Yes
Call forwarding and simultaneous ring Yes Yes Yes
Call history Yes Yes Yes
Call hold/retrieve Yes Yes Yes
Call park No No No
Call transfer (blind, consult, and mobile) Yes Yes Yes
Caller ID Yes Yes Yes
Call waiting Yes Yes Yes
Camp-on Yes Yes Yes
Clients for PC, Mac, and mobile Yes Yes Yes
Device switching Yes Yes Yes
Distinctive ringing No No Yes
Do-not-disturb routing Yes Yes Yes
Emergency calling - static location No No Yes
Emergency calling - dynamic location No No No
Enterprise calendar call routing Yes Yes Yes
Extension dialing No No No
Group call pickup No No No
Hunt groups/call queues and treatment No No Yes
Integrated dial-pad No No Yes
Location-based routing No No No
Music on hold Yes Yes Yes
Outbound DID manipulation No No No
Private line No No No
Qualified IP desk phones No No Yes
Shared line appearance No No No
Skype and federated calling Yes Yes Yes
Team calling No No Yes
Video call monitor Yes Yes Yes
Voicemail No No Yes
Calling Plans (Domestic Calling Plan, with required add-on purchase) No2 No2 Yes
Calling Plans (International Calling Plan, with required add-on purchase) No2 No2 Yes
Communications Credits No No Yes
Skype for Business Voice Yes Yes Yes
Security and archiving Office 365 A1 Office 365 A3 Office 365 A5
IM and media encryption Yes Yes Yes
IM and file filtering No No No
Client version control Yes Yes Yes
IM content archiving Yes Yes Yes
Conference content archiving Yes Yes Yes
Application sharing, and desktop sharing archiving Yes No No
User level archiving configuration Yes Yes Yes
Login trace files Yes Yes Yes
Exchange and SharePoint interoperability Office 365 A1 Office 365 A3 Office 365 A5
Presence interoperability with Exchange Server Yes Yes Yes
Presence interoperability with Exchange Online Yes Yes Yes
Unified Messaging interoperability with Exchange Server No No No
Unified Messaging interoperability with Exchange Online No No No
Outlook on the web interoperability Yes Yes Yes
Archiving interoperability with Exchange Server No No No
Archiving interoperability with Exchange Online Yes Yes Yes
Skill Search with SharePoint Server No No No
Skill Search with SharePoint Online No No No
Skype for Business Online administration and management Office 365 A1 Office 365 A3 Office 365 A5
Microsoft Office 365 portal Yes Yes Yes
Microsoft 365 admin center Yes Yes Yes
Skype for Business admin center Yes Yes Yes
Windows PowerShell Yes Yes Yes
Skype for Business Online reporting in Microsoft 365 admin center Yes Yes Yes

Note

1 The Skype for Business (Lync) client is supported for use with these subscription options, but it is not included. Lync 2013 Basic is available for all customers. The Lync Basic desktop client is a locally installed application that provides presence, instant messaging, and conferencing features for plans that include Skype for Business Online. Microsoft 365 Apps for enterprise, and Office 365 A3 include the full Skype for Business (Lync) application, which includes additional features such as advanced telephony support, archiving, and compliance features. A Skype for Business Online license must be assigned for each user. For more information on Lync Basic features, see Desktop client comarison tables
2 You must assign an Exchange Online (Plan 2) plan to users who you want to have voice mail. An Exchange Online (Plan 1) plan can't be used for voice mail.

Skype for Business Online limits

The limits in Skype for Business Online fall into the following categories:

Note

The limits applied to a Microsoft 365 organization can differ depending on how long the organization has been enrolled in the service. When a limit is changed in the Microsoft data centers, it can take some time to apply the change to all existing customers.

Peer-to-peer limits

  • File transfer limit - The maximum size of a file that can be transferred in a Skype for Business Online IM conversation. To learn which file types are blocked for file transfer, see the Microsoft Support article about sending and receiving files or attachments in Skype for Business Online.

  • Open tabbed conversations limit - The maximum number of conversation tabs that a Skype for Business user can have open at one time.

Feature Office 365 A1 Office 365 A3 Office 365 A5
File transfer limit No limit No limit No limit
Open tabbed conversations limit 50 50 No limit

Meeting limits

  • File upload limit - The maximum size of files that can be uploaded to a Skype for Business meeting, including handouts and PowerPoint presentations.

  • Participants in a Skype for Business meeting - The maximum number of participants (including the presenter) who can join a single Skype for Business meeting.

  • Presenters in a Skype for Business meeting - The maximum number of presenters in a single Skype for Business meeting.

  • Skype for Business web app meeting participants - The maximum number of Skype for Business web app meeting participants who can join a meeting.

  • Skype for Business web app anonymous participants - The maximum number of Skype for Business web app meeting participants who can anonymously join a meeting.

  • Guests joining by phone - The maximum number of guests who can call in to a meeting.

Feature Office 365 A1 Office 365 A3 Office 365 A5
File upload limit 500 MB 500 MB 500 MB
Participants in a Skype for Business meeting1 250 250 250
Presenters in a Skype for Business meeting 250 250 250
Skype for Business web app meeting participants 250 250 250
Skype for Business web app anonymous participants 250 250 250
Guests joining by phone 250 250 250
Individuals in a team-call group 25 25 25

Note

1 If the number of participants in a Skype for Business meeting exceeds 75 participants, then the participant list (presenters and attendees) in the meeting roster will be truncated so that an individual attendee sees only the presenters and the individual attendee's own name. The full participant list remains visible to the presenters in the meeting. Also, Gallery View and IM errors are hidden from the attendees.

Meeting retention limits

  • Meeting content retention period - The amount of time after the last person leaves a meeting that any uploaded meeting content is retained in Skype for Business before it is permanently deleted.

  • Meeting expiration period - The amount of time after a meeting has ended that users can access the meeting.

Note

Each person can have a maximum of 1000 conferences in the database at any time.

Feature Office 365 A1 Office 365 A3 Office 365 A5
Meeting content retention: One-time meeting 15 days 15 days 15 days
Meeting content retention: Recurring meeting 15 days 15 days 15 days
Meeting content retention: Meet Now meeting 8 hours 8 hours 8 hours
Meeting expiration: One-time meeting 14 days 14 days 14 days
Meeting expiration: Recurring meeting 14 days 14 days 14 days
Meeting expiration: Meet Now meeting 8 hours 8 hours 8 hours

Minute limits

For information about minute limitations in Skype for Business Online Domestic and International Calling Plans, see Skype for Business Online PSTN services use terms.