Status: Resolved

Posted: 13 November 2026, 08:41 (UTC)

Update: Service has been restored. We are in the process of clearing the queues, and functionality should be back to normal in the next few hours.

Microsoft is experiencing an M365 service incident that affects mail delivery to Exchange Online mailboxes. The incident also affects the Microsoft Graph API, which means that Email Security (PhishTitan) cannot currently process the emails it receives. Once the Microsoft service is restored, all queued emails will be processed.

Update history: 

• 13 November 2026, 08:41 (UTC): Posted
• 13 November 2026, 14:55 (UTC): Marked as Resolved