You have a Microsoft 365 subscription. You have set up conditional access policies to block out devices that does not meet your compliancy requirements. You know need to verify which devices are being blocked out. What should you do? 

Answer options:

A.Active Directory admin center – Audit logs
B.Active Directory admin center – Sign-ins
C.Cloud App Security admin center – Activity log
D.Microsoft Endpoint Manager admin center – Compliance policies

Correct Answer: B 
When you have created a conditional access policy, such as a device compliance policy, you can view all related sign-in events in the Azure AD admin center sign-in blade. When a device is blocked out due to not meeting compliancy requirements, you will see the event here. 

Option A is incorrect. The audit logs displays a log of performed tasks in your tenant, but not sign-in related events. 
Option C is incorrect. You can use cloud app security admin center activity logs to view security related events and alerts in your tenant.
Option D is incorrect. You can create new device compliancy policies here, but this is not where you view conditional access sign-in events.
Reference: 
To know more about viewing conditional access events, please refer to the link below: 

https://docs.microsoft.com/en-us/azure/active-directory/conditional-access/troubleshoot-conditional-access