Assessing Office 365 network connectivity
This article applies to both Office 365 Enterprise and Microsoft 365 Enterprise.
Office 365 is designed to enable customers all over the world to connect to the service using an internet connection. As the service evolves, the security, performance, and reliability of Office 365 are improved based on customers using the internet to establish a connection to the service.
Customers planning to use Office 365 should assess their existing and forecasted internet connectivity needs as a part of the deployment project. For enterprise class deployments reliable and appropriately sized internet connectivity is a critical part of consuming Office 365 features and scenarios.
Network evaluations can be performed by many different people and organizations depending on your size and preferences. The network scope of the assessment can also vary depending on where you're at in your deployment process. To help you get a better understanding of what it takes to perform a network assessment, we've produced a network assessment guide to help you understand the options available to you. This assessment will determine what steps and resources need to be added to the deployment project to enable you to successfully adopt Office 365.
A comprehensive network assessment will provide possible solutions to networking design challenges along with implementation details. Some network assessments will show that optimal network connectivity to Office 365 can be accommodated with minor configuration or design changes to the existing network and internet egress infrastructure.
Some assessments will indicate network connectivity to Office 365 will require additional investments in networking components. For example, enterprise networks that span branch offices and multiple geographic regions may require investments in SD-WAN solutions or optimized routing infrastructure to support internet connectivity to Office 365. Occasionally an assessment will indicate network connectivity to Office 365 is influenced by regulation or performance requirements for scenarios such as Skype for Business Online media quality. These additional requirements may lead to investments in internet connectivity infrastructure, routing optimization, and specialized direct connectivity.
Some resources to help you assess your network:
- See Office 365 network connectivity overview for conceptual information about Office 365 networking.
- See Office 365 Network Connectivity Principles to understand the connectivity principles for securely managing Office 365 traffic and getting the best possible performance.
- Sign up for Microsoft FastTrack for guided assistance with Office 365 planning, design and deployment.
- See the Office 365 Network Onboarding tool section below to run basic connectivity tests that provide specific guidance about networking connectivity improvements that can be made between a given user location and Office 365.
Microsoft authorization is required to use ExpressRoute for Office 365. Microsoft reviews every customer request and only authorizes ExpressRoute for Office 365 usage when a customer's regulatory requirement mandates direct connectivity. If you have such requirements, please provide the text excerpt and web link to the regulation which you interpret to mean that direct connectivity is required in the ExpressRoute for Office 365 Request Form to begin a Microsoft review. Unauthorized subscriptions trying to create route filters for Office 365 will receive an error message.
Key points to consider when planning your network assessment for Office 365:
Office 365 is a secure, reliable, high performance service that runs over the public internet. We continue to invest to enhance these aspects of the service. All Office 365 services are available via internet connectivity.
We are continually optimizing core aspects of Office 365 such as availability, global reach, and performance for internet based connectivity. For example, many Office 365 services leverage an expanding set of internet facing edge nodes. This edge network offers the best proximity and performance to connections coming over the internet.
When considering using Office 365 for any of the included services such as Teams or Skype for Business Online voice, video, or meeting capabilities, customers should complete an end to end network assessment and meet connectivity requirements using Microsoft FastTrack.
If you're evaluating Office 365 and aren't sure where to begin with your network assessment or have found network design challenges that you need assistance to overcome, please work with your Microsoft account team.
The Office 365 Network Onboarding tool
The Office 365 Network Onboarding tool is a proof of concept (POC) network assessment tool that runs basic connectivity tests against your Office 365 tenant and makes specific network design recommendations for optimal Office 365 performance. The tool highlights common large enterprise network perimeter design choices which are useful for Internet web browsing but impact the performance of large SaaS applications such as Office 365.
The Network Onboarding tool does the following:
- Detects your location, or you can specify a location to test
- Checks the location of your network egress
- Tests the network path to the nearest Office 365 service front door
- Provides advanced tests using a downloadable Windows 10 application that makes perimeter network design recommendations related to proxy servers, firewalls, and DNS. The tool also runs performance tests for Skype for Business Online, Microsoft Teams, SharePoint Online and Exchange Online.
The tool has two components: a browser-based UI that collects basic connectivity information, and a downloadable Windows 10 application that runs advanced tests and returns additional assessment data.
The browser-based tool displays the following information:
- Results and impact tab
- The location on a map of the in-use service front door
- The location on a map of other service front doors that would provide optimal connectivity
- Relative performance compared to other Office 365 customers near you
- Details and solutions tab
- User location by city and country
- Network egress location by city, state and country
- User to network egress distance
- Office 365 Exchange Online service front door location
- Optimal Office 365 Exchange Online service front door(s) for user location
- Customers in your metro area with better performance
The Advanced Tests downloadable application provides the following additional information:
- Details and solutions tab (appended)
- User's default gateway
- Client DNS Server
- Client DNS Recursive Resolver
- Exchange Online DNS server
- SharePoint Online DNS server
- Proxy server identification
- Media connectivity check
- Media quality packet loss
- Media quality latency
- Media quality jitter
- Media quality packet reorder
- Connectivity tests to multiple feature-specific endpoints
- Network path diagnostics that include tracert and latency data for the Exchange Online, SharePoint Online and Teams services
You can read about the Office 365 Network Onboarding tool and provide feedback at the Updated Office 365 Network Onboarding Tool POC with new network design recommendations blog post. Information about future updates to this tool and other Office 365 networking updates will be posted to the Office 365 Networking blog.
Here's a short link you can use to come back: https://aka.ms/o365networkconnectivity.
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