Status Page

O365 - General

2025-10-28	Status	Description
11:07 AM		EXCHANGE NOTICE Users may be unable to access some Exchange Online archive mailboxes Service Restored More info: This issue occurred when routine mailbox database maintenance for archive mailboxes relocated the archive to a different portion of Active Directory infrastructure from the primary mailbox. Impact may have persisted both during the maintenance move and after the move. The problem impacted archive mailbox access through any Exchange Online connection method. Final status: The service provider has confirmed the fix has completed its deployment and been activated in all environments, confirming mitigation with affected users and service telemetry. Scope of impact: Any user attempting to access their Exchange Online archive mailbox may have encountered this issue if their primary and archive mailboxes weren't located on the same portion of Active Directory infrastructure. Start time: Monday, June 23, 2025, at 11:00 AM AST End time: Monday, October 27, 2025, at 7:00 PM AST
10:58 AM		EXCHANGE NOTICE Users may be unexpectedly signed out from Outlook on the web when accessing shared mailboxes Service Restored Final status: The service provider has determined that a recent package intended to update the appearance of the Outlook suite header contained a bug that created this impact. A new version of this update, without the bug, was then implemented to update the suite header without any residual impact. Scope of impact: This issue could have potentially affected any user when accessing shared mailboxes from Outlook on the web. Start time: Tuesday, October 14, 2025, at 6:18 AM AST End time: Monday, October 20, 2025, at 11:00 PM AST