| EX1268771 | Exchange Online | Users may be intermittently unable to access their Exchange Online mailboxes in some connection methods. |
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| Status | serviceDegradation |
|---|---|
| Classification | advisory |
| User Impact | Users may be intermittently unable to access their Exchange Online mailboxes in some connection methods. |
| Last Updated | 04/14/2026 18:48:08 |
| Start Time | 04/02/2026 19:14:14 |
| End Time | |
| Latest Message | Title: Users may be intermittently unable to access their Exchange Online mailboxes in some connection methods.
User impact: Users may be intermittently unable to access their Exchange Online mailboxes in some connection methods. More info: This issue may intermittently impact some users attempting to access the Exchange Online service through the Outlook mobile apps or the new Outlook for Mac desktop client. Current status: We’re continuing to monitor our fix deployment as it saturates throughout the remaining 10 percent of the affected environment. Many previously impacted users will begin to experience significant impact relief as this saturation finalizes. In tandem, we’re implementing a program to identify and restart the Notification service as persistent errors are identified. Scope of impact: This issue intermittently impacts some users attempting to access their Exchange Online mailboxes, with a smaller subset of users persistently unable to access their Exchange Online mailboxes in the Outlook mobile apps or the new Outlook for Mac desktop client. This section may be updated as our investigation progresses. Start time: Tuesday, March 17, 2026, at 2:00 PM UTC Root cause: A service component that facilitates notification generation and delivery isn’t processing requests as expected, which is resulting in impact. Next update by: Friday, April 17, 2026, at 8:00 PM UTC |