Conditional Access Policy Settings Cause Microsoft 365 Access Issues
On March 23, 2023, at ~8:22 AM ET, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users with certain conditional access policies applied were unable to access any Microsoft 365 service.
For IT pros or system admins with Microsoft admin center "working" access, the incident number to reference for more complete details was MO531859.