Users may be intermittently unable to access their mailboxes in Exchange Online using any connection method

Microsoft issued an incident report on 8 Jul 2025 (Tue)

Users Affected	Any user who attempts to access the Outlook
Start Time	8 Jul 2025 (Tue) 8:36 AM
End Time	To be updated
User Impact	Users may be intermittently unable to access their mailboxes in Exchange Online using any connection method.
Incident Details	Current status: Microsoft is continuing to investigate a portion of the Exchange Online infrastructure which facilitates accessing mailboxes through the affected connection methods to help with understanding the root cause and to formulate a remediation plan. Next update by: 9 Jul 2025 (Wed)
Status	Microsoft is fixing the problem

Last update by Microsoft: 8 Jul 2025 (Tue) 9:49 AM

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