💡 Our Technical Review in summary
Summary
A power surge within Azure infrastructure in the West US region caused a multi-day service interruption affecting several Microsoft 365 services. The issue began on Saturday, February 7, 2026, and was fully resolved by Monday, February 9, 2026. Microsoft has since restored the affected infrastructure and processed all data backlogs.
Impact
Users in the West US region may have experienced the following issues:
- Power BI: Inability to execute data plane operations.
- Microsoft Defender (Cloud Apps, Identity, Office 365): Disruptions to Advanced Hunting, anomaly detection, file policy evaluation, and delayed/stale data in Threat Explorer.
- Microsoft Intune: Device enrollment failures.
- Microsoft Purview: Communication Compliance policy hits were not visible.
- Microsoft Defender XDR: Admins were unable to complete onboarding activities.
Status
Service Restored. The impact has been remediated for all users. Microsoft is currently reviewing options to increase power surge protection in the affected infrastructure to prevent future occurrences.
Microsoft Official Issue Details
User Impact
Users may have experienced various issues with some Microsoft 365 services.
Status: serviceRestored
Service: Microsoft 365 suite
Classification: advisory
Origin: microsoft
Updates
- 2026-02-09 16:48
Title: Some users may experience various issues with some Microsoft 365 servicesUser impact: Users may have experienced various issues with some Microsoft 365 services.
More info: This issue impacted the following services and scenarios:
– Some users in the West US region may have been unable to execute data plane operations in Power BI.
– Some users may have been unable to utilize Activity and file policy evaluation, Anomaly detection, or Advanced hunting for Microsoft Defender for Cloud Apps.
– Users may have also seen stale information in the portal and execution of governance actions for Microsoft Defender for Cloud Apps.
– Some users may have been unable to utilize Advanced hunting in Microsoft Defender for Identity.
– Admins may have been unable to complete onboarding activities in the Microsoft Defender XDR portal.
– Admins may have been unable to see Microsoft Purview Communication Compliance policy hits in Microsoft Purview.
– Users may have been unable to view recent data in Threat Explorer and Advanced Hunting within Microsoft Defender for Office 365.
– Users may have seen device enrollment failures in Microsoft Intune.Final status: We’ve completed our efforts to restore the remaining infrastructure and further confirmed that the remaining backlogs have been processed. Impact has been remediated for all users.
Scope of impact: This issue may have affect users in the West US region who were attempting to utilize the features outlined in the More info section.
Start time: Saturday, February 7, 2026, at 8:00 AM UTC
End time: Monday, February 9, 2026, at 12:24 PM UTC
Root cause: A recent power surge within a portion of our Azure infrastructure in the West US region caused services to go temporarily offline.
Next steps:
– We’re reviewing options to increase power surge protection in the affected portion of infrastructure to better prevent similar future impact.This is the final update for the event.
- 2026-02-07 21:26
Title: Some users may experience various issues with some Microsoft 365 servicesUser impact: Users may experience various issues with some Microsoft 365 services.
More info: This issue impacts the following services and scenarios:
– Some users in the West US region may be unable to execute data plane operations in Power BI.
– Some users may be unable to utilize Activity and file policy evaluation, Anomaly detection, or Advanced hunting for Microsoft Defender for Cloud Apps.
– Users may also see stale information in the portal and execution of governance actions for Microsoft Defender for Cloud Apps.
– Some users may be unable to utilize Advanced hunting in Microsoft Defender for Identity.
– Admins may be unable to complete onboarding activities in the Microsoft Defender XDR portal
– Admins may be unable to see Microsoft Purview Communication Compliance policy hits in Microsoft Purview.
– Users may be unable to view recent data in Threat Explorer and Advanced Hunting within Microsoft Defender for Office 365.
– Users may see device enrollment failures in Microsoft Intune.Current status: Our backup power systems have connected all but a subset of the impacted services and we’re working to process the remaining backlogs to ensure full recovery for those services. Review of service health telemetry indicates the backup power systems have returned those services to expected functionality, and we’re continuing our efforts to restore the remaining affected infrastructure.
Scope of impact: This issue may affect users in the West US region who are attempting to utilize the features outlined in the More info section.
Start time: Saturday, February 7, 2026, at 8:07 AM UTC
Root cause: A recent power surge within a portion of our Azure infrastructure in the West US region caused services to go temporarily offline.
Next update by: Monday, February 9, 2026, at 6:00 PM UTC
- 2026-02-07 19:22
Title: Some users may experience various issues with some Microsoft 365 servicesUser impact: Users may experience various issues with some Microsoft 365 services.
More info: This issue impacts the following services and scenarios:
– Some users in the West US region may be unable to execute data plane operations in Power BI.
– Some users may be unable to utilize Activity and file policy evaluation, Anomaly detection, or Advanced hunting for Microsoft Defender for Cloud Apps.
– Users may also see stale information in the portal and execution of governance actions for Microsoft Defender for Cloud Apps.
– Some users may be unable to utilize Advanced hunting in Microsoft Defender for Identity.
– Admins may be unable to complete onboarding activities in the Microsoft Defender XDR portal
– Admins may be unable to see Microsoft Purview Communication Compliance policy hits in Microsoft Purview.
– Users may be unable to view recent data in Threat Explorer and Advanced Hunting within Microsoft Defender for Office 365.
– Users may see device enrollment failures in Microsoft Intune.
Current status: We’re seeing recovery within a portion of the affected Microsoft 365 services as our backup power systems connect to impacted services and the backlog from services are processed. We’re reviewing telemetry related to the remaining portion of affected infrastructure to determine what additional mitigation actions are required to fully recover the service.
Scope of impact: This issue may affect users in the West US region who are attempting to utilize the features outlined in the More info section.
Root cause: A recent power surge within a portion of our Azure infrastructure in the West US region caused services to go temporarily offline.
Next update by: Saturday, February 7, 2026, at 9:30 PM UTC
- 2026-02-07 17:16
Title: Some users may experience various issues with some Microsoft 365 servicesUser impact: Users may experience various issues with some Microsoft 365 services.
More info: This issue impacts the following services and scenarios:
– Some users in the West US region may be unable to execute data plane operations in Power BI.
– Some users may be unable to utilize Activity and file policy evaluation, Anomaly detection, or Advanced hunting for Microsoft Defender for Cloud Apps.
– Users may also see stale information in the portal and execution of governance actions for Microsoft Defender for Cloud Apps.
– Some users may be unable to utilize Advanced hunting in Microsoft Defender for Identity.
– Admins may be unable to complete onboarding activities in the Microsoft Defender XDR portal
– Admins may be unable to see Microsoft Purview Communication Compliance policy hits in Microsoft Purview.
– Users may be unable to view recent data in Threat Explorer and Advanced Hunting within Microsoft Defender for Office 365.
– Users may see device enrollment failures in Microsoft Intune.
Current status: Our monitoring has notified us of an issue in the West US region where some users may experience various impacts to some Microsoft 365 services, which we’ve outlined in the More info section above. We’ve confirmed that a recent power surge at a portion of our Azure infrastructure in the West US region caused services to go temporarily offline. Our backup power systems were activated and we’ve confirmed that power remains stable to handle service activity. We’re working to restore connectivity to the impacted services to fully resolve this issue.
Scope of impact: This issue may affect users in the West US region who are attempting to utilize the features outlined in the More info section.
Root cause: A recent power surge within a portion of our Azure infrastructure in the West US region caused services to go temporarily offline.
Next update by: Saturday, February 7, 2026, at 7:30 PM UTC
