O365 - Email/Outlook
| 2026-02-03 | Status | Description |
|---|---|---|
| 03:04 PM |
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Group owners may be unable to modify group memberships in the Global Address Book in the classic Outlook desktop client Status: Service Restored Details User impact: Group owners were unable to modify group memberships in the Global Address Book in the classic Outlook desktop client. More info: Distribution Groups may have been able to be modified, but Security Groups may have been affected. While we worked towards mitigation, affected users may have been able to utilize the new Outlook desktop client or Outlook on the web to perform Distribution Group modifications. Final status: We've identified that a recent feature change intended to enable the use of a new API for managing distribution group modifications introduced an issue resulting in impact. We've reverted the affecting change and confirmed that impact was successfully remediated. Scope of impact: This issue may have affected all group owners modifying certain group memberships through the Outlook Address Book in the classis Outlook desktop client. Start time: Tuesday, February 3, 2026, at 9:15 AM AST End time: Tuesday, February 3, 2026, at 2:29 PM AST |
| 2026-02-02 | Status | Description |
|---|---|---|
| 10:49 AM |
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EXCHANGE NOTICE Users' contacts hidden from the Global Address List (GAL) may not appear in Outlook on the web people search results Service Degradation Current status: The service provider is reviewing service monitoring telemetry to isolate the source of the issue and establish a fix. |
| 09:14 AM |
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EXCHANGE NOTICE Users routing their Exchange Online email through a third-party protection service may have send and receive delays Service Restored More info: This issue specifically impacted users who use Simple Mail Transfer Protocol (SMTP) as their Exchange Online connection method and routed their email messages through a specific third-party email protection service. The email delays, which impacted both sending and receiving email, occurred in all Exchange Online connection methods. Final status: The service provider has fully implemented their identified configuration change and confirmed using internal telemetry that it effectively mitigated this issue. Thy determined that this issue was due to an issue with cache limit configuration that helps facilitate the impacts scenario process with SMTP mail flow. Scope of impact: This problem may have impacted any user sending or receiving email messages when leveraging a specific third-party email protection service. Start time: Monday, January 26, 2026, at 3:00 AM AST End time: Friday, January 30, 2026, at 3:25 PM AST |
No Issue
Outage
