How Cloud App Security helps protect your Office 365 environment

Applies to: Microsoft Cloud App Security

As a major productivity suite providing cloud file storage, collaboration, BI, and CRM tools, Office 365 enables your users to share their documents across your organization and partners in a streamlined and efficient way. Using Office 365 may expose your sensitive data not only internally, but also to external collaborators, or even worse make it publicly available via a shared link. Such incidents might occur due to malicious actor, or by an unaware employee. Office 365 also provides a large third-party app eco-system to help boost productivity. Using these apps can expose your organization to the risk of malicious apps or use of apps with excessive permissions.

Connecting Office 365 to Cloud App Security gives you improved insights into your users' activities, provides threat detection using machine learning based anomaly detections, information protection detections (such as detecting external information sharing), enables automated remediation controls, and detects threats from enabled third-party apps in your organization.

Using the Office 365 connector provides protection for the following products:

  • Dynamics 365 CRM
  • Exchange
  • Office 365
  • OneDrive
  • Power Automate
  • Power BI
  • SharePoint
  • Skype for Business
  • Teams
  • Yammer

Note

Cloud App Security integrates directly with Office 365's audit logs and receives all audited events from all supported services, such as PowerApps, Forms, Sway, and Stream.

Main threats

  • Compromised accounts and insider threats
  • Data leakage
  • Insufficient security awareness
  • Malicious third-party apps
  • Malware
  • Phishing
  • Ransomware
  • Unmanaged bring your own device (BYOD)

How Cloud App Security helps to protect your environment

Control Office 365 with built-in policies and policy templates

You can use the following built-in policy templates to detect and notify you about potential threats:

Type Name
Built-in anomaly detection policy Activity from anonymous IP addresses
Activity from infrequent country
Activity from suspicious IP addresses
Impossible travel
Activity performed by terminated user (requires AAD as IdP)
Malware detection
Multiple failed login attempts
Ransomware detection
Suspicious email deletion activity (Preview)
Suspicious inbox forwardingUnusual file deletion activities
Unusual file share activities
Unusual multiple file download activities
Activity policy template Logon from a risky IP address
Mass download by a single user
Potential ransomware activity
Access level change (Teams)
External user added (Teams)
Mass deletion (Teams)
File policy template Detect a file shared with an unauthorized domain
Detect a file shared with personal email addresses
Detect files with PII/PCI/PHI
OAuth app anomaly detection policy Misleading OAuth app name
Misleading publisher name for an OAuth app
Malicious OAuth app consent

For more information about creating policies, see Create a policy.

Automate governance controls

In addition to monitoring for potential threats, you can apply and automate the following Office 365 governance actions to remediate detected threats:

Type Action
Data governance OneDrive:
- Inherit parent folder permissions
- Make file/folder private
- Put file/folder in admin quarantine
- Put file/folder in user quarantine
- Trash file/folder
- Remove a specific collaborator
- Remove external collaborators on file/folder
- Apply Azure Information Protection classification label
- Remove Azure Information Protection classification label
SharePoint:
- Inherit parent folder permissions
- Make file/folder private
- Put file/folder in admin quarantine
- Put file/folder in user quarantine
- Put file/folder in user quarantine and add owner permissions
- Trash file/folder
- Remove external collaborators on file/folder
- Remove a specific collaborator
- Apply Azure Information Protection classification label
- Remove Azure Information Protection classification label
User governance - Notify user on alert (via Azure AD)
- Require user to sign in again (via Azure AD)
- Suspend user (via Azure AD)
OAuth app governance - Revoke OAuth app permission

For more information about remediating threats from apps, see Governing connected apps.

Protect Office 365 in real time

Review our best practices for securing and collaborating with external users and blocking and protecting the download of sensitive data to unmanaged or risky devices.

Next steps