Microsoft Exchange Online outage: email failures and auth issues

Mon, 31 Aug 2026 18:00:29 +0000

Engineer — Skip
SOC/IR — Skip
Leader — Learn: An active Exchange Online outage affecting email and authentication may warrant a brief heads-up to leadership if email disruption is visible org-wide; monitor Microsoft’s service health dashboard for resolution timeline and impact scope.

Microsoft Exchange Online Bug Mistakenly Quarantining Mailboxes

Thu, 23 Jul 2026 12:47:45 +0000

Engineer — Plan: Monitor Microsoft’s service health dashboard (EX1234 or similar incident ID) for resolution status; if Exchange Online is in your environment, check whether any mailboxes have been incorrectly quarantined and open a support ticket if affected.
SOC/IR — Skip
Leader — Learn: An availability incident affecting Exchange Online mailboxes is a business-continuity data point; no leadership action required until Microsoft’s resolution confirms scope or data impact.