EX610644, Exchange Online: having issues

EX610644, Exchange Online

User Impact: Some users may be unable to access their Exchange Online mailbox using

Outlook on the web

Start time: Tuesday, June 27, 2023 5:13:34 AM

Status
Service degradation

Current status: Microsoft is analyzing any recent deployments that could be contributing to impact and continue to review service monitoring telemetry to locate the root cause of impact.

User impact: Users may be unable to access their Exchange Online mailbox using Outlook on the web.

More info: Affected users may encounter an unexpected 500 error when accessing Outlook on the web.



Current status: Microsoft has determined that re-applying the updated build on a limited scale has not resulted in service recovery as expected. Microsoft is investigating this outcome and focused on alternate mitigation options to resolve the issue as quickly as possible.



Scope of impact: Impact is specific to users who are attempting to access their Exchange Online mailbox using Outlook on the web. While this issue could affect users hosted in multiple regions worldwide, Microsoft's telemetry indicates that impact is being experienced primarily to users hosted in North America.

Preliminary root cause: Microsoft suspects that a configuration issue within a recent service build is causing impact.