Does not affect users with already active sessions.
Microsoft has confirmed issues with its Azure Active Directory service that are preventing a number of users from authenticating to gain access to cloud-based applications and services.
The company said in a status advisory that “customers using Azure Active Directory or Microsoft Account may experience authentication issues when attempting to access Azure, Dynamics 365, and/or Microsoft 365.”
“We are aware of this issue and are actively investigating,” it said.
Check here for the Microsoft 365 Status Twitter account.