Problem:
When an agent logins to Omni-Channel for Customer service App he gets the below error and the agent status does not load.
There was a problem with your single sign-on account. Please sign out of all Microsoft Dynamics 365 apps and sign in again. If this continues, have your administrator contact Microsoft Support with client session ID.

Root Cause:
In Azure AD, check if Security Defaults is turned on. If it is turned on, the agent should have the right authentication set up.

Resolution:
Set up right Authentication for Agent.
Alternatively switch off security defaults in Azure AD.


That’s it!! Issue is fixed.