Users and admins may be unable to access SharePoint Online or the SharePoint Online admin center
ID: SP1070801
Issue type: Incident
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Impacted services
SharePoint Online
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Details
Title: Users and admins may be unable to access SharePoint Online or the SharePoint Online admin center
User impact: Users and admins may have been unable to access SharePoint Online or the SharePoint Online admin center.
Final status: We've identified that a recent authentication change was deployed before the service was prepared for it, resulting in authentication failures that prevented users and admins from accessing SharePoint Online and the SharePoint Online admin center. We've disabled this change and confirmed using our internal monitoring telemetry, along with reports from affected users, that impact is remediated.
Scope of impact: Any user or admin that attempted to access SharePoint Online or the SharePoint Online admin center may have been impacted.
Start time: Friday, May 9, 2025, at 6:33 PM UTC
End time: Friday, May 9, 2025, at 9:11 PM UTC
Preliminary root cause: A recent authentication change was deployed before the service was prepared for it, resulting in authentication failures that prevented users and admins from accessing SharePoint Online and the SharePoint Online admin center.
Next steps:
- We're reviewing our change validation procedures to identify improvements that will prevent similar issues from occurring in the future.
Final status: We've identified that a recent authentication change was deployed before the service was prepared for it, resulting in authentication failures that prevented users and admins from accessing SharePoint Online and the SharePoint Online admin center. We've disabled this change and confirmed using our internal monitoring telemetry, along with reports from affected users, that impact is remediated.
Scope of impact: Any user or admin that attempted to access SharePoint Online or the SharePoint Online admin center may have been impacted.
Start time: Friday, May 9, 2025, at 6:33 PM UTC
End time: Friday, May 9, 2025, at 9:11 PM UTC
Root cause: A recent authentication change was deployed before the service was prepared for it, resulting in authentication failures that prevented users and admins from accessing SharePoint Online and the SharePoint Online admin center.
Next steps:
- We're reviewing our feature update validation procedure to identify improvements that will prevent similar issue from occurring in the future.
We'll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.
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