M365 - Not receiving external emails

Incident Report for U of G IT System

Resolved

Tests Indicate that message delivery times have returned to normal. All backlogged mail should be delivered. If you were expecting a message but have not received it, please contact the service desk.
Posted Jan 22, 2026 - 19:52 EST

Identified

Status update:

Microsoft is reporting that service has been restored. We are seeing that emails from outsides sources are starting to be delivered. There is a significant backlog of email to process and by the nature of how mail systems attempt deliveries it still may be a few hours before all mail is delivered and normal service fully restored. Thank you for your patience.

All backlogged mail will get delivered.
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Original Message:

Microsoft is reporting an issue with M365 Email. We have observed that email from external sources has not been delivered since approximately 13:15 this afternoon. There may be other issues that have not been reported.

Please be aware that this includes ALL email not originating from our M365 environment. (Listserv, Maestro, on-campus servers, cloud-based university services, GMail and all other mail platforms, etc.).

Our expectation is that all mail will be queued and delivered when the issue is resolved.

As of 4:30 PM EST, Microsoft believes they have identified the root cause and are starting to apply a solution. They have not provided and expected time for everything to be resolved.
Posted Jan 22, 2026 - 18:30 EST