News
Oct
16
*** Update**

16 Oct 2025, 14:55 BST




Some users may be unable to access their mailbox in Exchange Online via any connection method

Issue ID: EX1173531
Affected services: Exchange Online
Status: Investigating
Issue type: Incident
Start time: 16 Oct 2025, 08:53 BST

User impact
Users may be unable to access their mailbox in Exchange Online via any connection method.

Scope of impact
Impact is specific to some users in the United Kingdom attempting to access their mailbox in Exchange Online via any connection method.


Current status
16 Oct 2025, 09:15 BST
We're reviewing service monitoring telemetry to isolate the source of the issue and establish a fix.

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