Azure AD Sign-in Error 50131

Error 50131 - Used in various conditional access errors. E.g. Bad Windows device state, request blocked due to suspicious activity, access policy, and security policy decisions.

About Azure Activity sign-in activity reports:

Azure Active Directory's reporting tool generates 'Sign-in activity' reports that give you insights on who has performed the tasks that are enlisted in the Audit logs.

• All Sign-in activity reports can be found under the Activity section of Azure Active Directory.
• The default list view of Audit logs can be customized by adding additional fields.
• The reports can also be filtered to let you view only the activities that are relevant. 
• Here is an example of how a sign-in activity report looks like:

  

Error description:

Sign-in failed due to various conditional access errors like :

• Bad state of Windows device.
• Request blocked due to suspicious activity.
• Access policy and security policy decisions.

Auditing Azure AD environments with ADAudit Plus:

ADAudit Plus offers change monitoring for your Azure AD environment with the following features:

• Correlated view across hybrid environments
• Real-time alerts
• Schedulable reports
• Autonomous change remediation
• Comprehensive search
• Out-of-the-box compliance reports