incidentcriticalinvestigating
Microsoft 365 sign-in failures: field observations and safe workarounds
We are correlating reports from multiple regions. Users can reach Teams web but Outlook desktop is intermittently failing token refresh. Share tenant region, auth method, and mitigation attempts.
Field Responses
Nested replies, workarounds, verification notes, and accepted solution flow.
Moderator note: do not disable conditional access globally. Use a scoped break-glass exclusion and document the window.