Resolved after 18 hours 43 minutes, affecting Office 365 (Email and Calendaring), on September 10, 2026.
Microsoft has confirmed that the issue is resolved and that service is restored for users of the Apple Mail Client connecting to and using Exchange Web Services (EWS).
Affected components
Update timeline
- identified Sep 10, 2026, 07:38 PM UTC
Northwestern Information Technology - Collaboration Services is aware of some issues for a limited number of users that have Apple Mail clients connecting to and using Exchange Web Services (EWS). Apple is also aware of this issue. Users are asked to either use Outlook Web Access (OWA) / Webmail or setup the Mac Outlook client as a workaround until the issue is resolved. Collaboration Services is looking into the issue and updates will be provided as they become available.
- resolved Sep 11, 2026, 02:21 PM UTC
Microsoft has confirmed that the issue is resolved and that service is restored for users of the Apple Mail Client connecting to and using Exchange Web Services (EWS).
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