In the device compliance report in Office 365, you can see which mobile devices aren't compliant with the mobile device policies you've deployed in Mobile Device Management for Office 365.
View the device compliance report
To view the report,
Go to the Security & Compliance Center > Reporting.
Under Device management, select Device compliance reports.
Understanding the device compliance report
The Device compliance report identifies:
Devices that are compliant
Devices that aren't compliant but still have access to your organization's data in Office 365
Devices that aren't compliant but whose access to your organization's data is blocked
To view the device compliance report, you must be an Office 365 global admin.