Microsoft 365 Email (Mac Devices) - Confirmed Service Issue

Incident Report for Duke IT

Identified

Microsoft has confirmed a service issue with Microsoft 365 email on Mac devices. Some users attempting to connect to the Outlook mobile app or Outlook client on Mac devices may be impacted.

Microsoft is working to restore service but there is no estimated time to resolution.

If you have questions about this outage or would like to report additional service impacts please contact the OIT Service Desk (https://oit.duke.edu/help) or join the conversation on the 'University IT Outage Communication' MS Teams site.

For more information about Microsoft 365 Email visit OIT's web page: https://oit.duke.edu/service/email-and-calendar/

Posted Sep 10, 2026 - 12:48 EDT

This incident affects: Collaboration and Communication (Microsoft 365).