Title: Can't access Microsoft 365 services User Impact: Users may be unable to access multiple Microsoft 365 services. More info: Existing sessions do not appear to be affected. Affected users are encouraged to keep existing sessions going and to avoid re-authenticating to Microsoft 365 services. Any Microsoft 365 service that leverages Azure Active Directory (AAD) authentication may be impacted by this issue. Current status: We've identified and are reverting a recent change to the service which may be causing or contributing to impact. Scope of impact: Any user may experience access problems for Microsoft 365 services.
Check https://status.office.com/ for updates.