Microsoft 365 (Business or Enterprise) incident
Admins may be unable to review Service health or Message center postings in the Microsoft 365 admin center
Microsoft 365 (Business or Enterprise) experienced a minor incident on October 12, 2026 affecting Microsoft 365 (Business or Enterprise), lasting 1d. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- monitoring Oct 13, 2026, 06:52 PM UTC
User impact: Admins may be unable to review Service health or Message c enter postings in the Microsoft 365 admin center. More info: Users may also see nothing in the "What's new" tab in the Microsoft Teams admin center and are returned an error stating "We can't load data. Try again." Current status: We've received reports from a subset of affected users who have reported that they are unable to review Service health or Message c enter postings in the Microsoft 365 admin center or see new activities in the “What’s new” tab in the Microsoft Teams admin center. We've isolated that a recent service update introduced a misconfiguration which cause s the Service Health and Communications API to return authentication errors, resulting in impact. We're rolling back the offending update and monitoring for remediation. We anticipate impact to be resolved by our next scheduled update. Scope of impact: This issue affects some admins who may be unable to review Service health or Message c enter postings in the Microsoft 365 admin center or see new activities in the “What’s new” tab in the Microsoft Teams admin center. This section may be updated as the investigation progresses. Start time: Monday, October 12, 2026, at 9:54 PM UTC Estimated time to resolve: We anticipate impact to be resolved by Tuesday, October 13, 2026, at 8:00 PM UTC. Root cause: A recent service update introduced a misconfiguration which cause s the Service Health and Communications API to return authentication errors, resulting in impact. Next update by: Tuesday, October 13, 2026, at 8:00 PM UTC
- identified Oct 13, 2026, 07:53 PM UTC
User impact: Admins may be unable to review Service health or Message center postings in the Microsoft 365 admin center. More info: Users may also see nothing in the "What's new" tab in the Microsoft Teams admin center and are returned an error stating "We can't load data. Try again." Current status: We're continuing to monitor recovery, and we anticipate some users will start to see remediation at this time. To ensure impact is fully remediated, we've extended our monitoring period, and we anticipate impact to be resolved by our next scheduled update. Scope of impact: This issue affects some admins who may be unable to review Service health or Message center postings in the Microsoft 365 admin center or see new activities in the “What’s new” tab in the Microsoft Teams admin center. This section may be updated as the investigation progresses. Start time: Monday, October 12, 2026, at 9:54 PM UTC Estimated time to resolve: We anticipate impact to be resolved by Tuesday, October 13, 2026, at 10:00 PM UTC. Root cause: A recent service update introduced a misconfiguration which causes the Service Health and Communications API to return authentication errors, resulting in impact. Next update by: Tuesday, October 13, 2026, at 10:00 PM UTC
- monitoring Oct 13, 2026, 07:53 PM UTC
User impact: Admins may be unable to review Service health or Message center postings in the Microsoft 365 admin center. More info: Users may also see nothing in the "What's new" tab in the Microsoft Teams admin center and are returned an error stating "We can't load data. Try again." Current status: We're continuing to monitor recovery, and we anticipate some users will start to see remediation at this time. To ensure impact is fully remediated, we've extended our monitoring period, and we anticipate impact to be resolved by our next scheduled update. Scope of impact: This issue affects some admins who may be unable to review Service health or Message center postings in the Microsoft 365 admin center or see new activities in the “What’s new” tab in the Microsoft Teams admin center. This section may be updated as the investigation progresses. Start time: Monday, October 12, 2026, at 9:54 PM UTC Estimated time to resolve: We anticipate impact to be resolved by Tuesday, October 13, 2026, at 10:00 PM UTC. Root cause: A recent service update introduced a misconfiguration which causes the Service Health and Communications API to return authentication errors, resulting in impact. Next update by: Tuesday, October 13, 2026, at 10:00 PM UTC
- identified Oct 13, 2026, 09:02 PM UTC
User impact: Admins may have been unable to review Service health or Message center postings in the Microsoft 365 admin center. More info: Admins' "What's new" tab in the Microsoft Teams admin center may have been blank and displayed an error stating, "We can't load data. Try again." Final status: We've completed our monitoring period and validated that the rollback of the service update containing the misconfiguration successfully remediated impact. Scope of impact: This issue affected some admins attempting to review Service health or Message center postings in the Microsoft 365 admin center or see new activities in the “What’s new” tab in the Microsoft Teams admin center. Start time: Monday, October 12, 2026, at 9:54 PM UTC End time: Tuesday, October 13, 2026, at 7:35 PM UTC Root cause: A recent service update introduced a misconfiguration which caused the Service Health and Communications API to return authentication errors, resulting in impact. Next steps: - We're analyzing the offending service update to determine why the potential for impact wasn't caught during our internal update testing and validation phases. This further analysis will help us to improve our update implementation processes moving forward to ensure similar impact scenarios don't occur in the future. This is the final update for the event.