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.
In Azure AD, check if Security Defaults is turned on. If it is turned on, the agent should have the right authentication set up.
Set up right Authentication for Agent.
Alternatively switch off security defaults in Azure AD.
That’s it!! Issue is fixed.