Degraded Microsoft 365 services affecting email and admin portals

Incident Report for ITS System

Investigating

Microsoft is investigating a potential issue impacting multiple Microsoft 365 services, including Exchange Online/Outlook. Reports indicate mail delivery delays or failures for messages sent from external senders.
Microsoft has acknowledged the issue publicly and is continuing its investigation. (MS reference: MO2121364, posted Jan 22, 2026).

Some of the impacted service functions include, but are not limited to:
- Sending and receiving email through Exchange Online;
- Listserv and Enterprise Service Center notifications;
- Emails sent from external services (e.g., Gmail, third-party platforms) are not being received by users;
- Microsoft 365 admin portals;

The M365 Admin Team is monitoring the situation closely and awaiting further updates from Microsoft.

Posted Jan 22, 2026 - 15:52 EST

This incident affects: Email Systems (Listserv, Office 365, UTMail+).