Microsoft has reported that a mitigation has been rolled out and the rate of errors seems to be going down rapidly. You can find all the information on Microsoft's status page: https://status.azure.com/en-us/status
Posted Mar 15, 2021 - 17:50 EDT
Update
We are continuing to work on a fix for this issue.
Posted Mar 15, 2021 - 15:51 EDT
Identified
The issue has been identified and a fix is being implemented.
Posted Mar 15, 2021 - 15:51 EDT
Investigating
An issue reported by Microsoft causes logins to fail with Azure Active Directory. Microsoft is investigating the issue at the moment. https://twitter.com/azuresupport?lang=fr