| EX1056704 | Exchange Online | Users may be unable to run Outlook (classic) in online mode and admins unable to utilize the Exchange admin center (EAC) |
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| Status | serviceDegradation |
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| Classification | advisory |
| User Impact | Users may be unable to run Outlook (classic) in online mode and admins may be unable to utilize the EAC. |
| Last Updated | 04/28/2025 09:16:05 |
| Start Time | 04/14/2025 00:00:00 |
| End Time | |
| Latest Message | Title: Users may be unable to run Outlook (classic) in online mode and admins unable to utilize the Exchange admin center (EAC)
User impact: Users may be unable to run Outlook (classic) in online mode and admins may be unable to utilize the EAC. More info: Some users may receive the following error: “HTTP 503 Service Unavailable.” Additionally, when attempting to complete operations in the EAC, admins are returned a “503 Service Unavailable” error. This can potentially impact any EAC related operation, including but not limited to mailbox provisioning. Admins who can leverage PowerShell to complete these tasks can do so to avoid this issue. Current status: We’ve successfully reduced the retry traffic and monitoring service telemetry to ensure that impact is remediated. Scope of impact: Any user who attempts to start Outlook (classic) in online mode or any admin utilizing the EAC may be impacted by this event. Start time: Monday, April 14, 2025, at 12:00 AM UTC Root cause: A high app requests and retries to an API that facilitates Outlook (classic) and the EAC are resulting in the impact. Next update by: Monday, April 28, 2025, at 7:00 PM UTC |