Some users may be unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop

Title: Some users may be unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop User impact: Users may have been unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop. Final status: We've completed deploying the fix to reduce the resource pressure, and we've validated by monitoring internal telemetry that the issue is resolved. Scope of impact: Impact was specific to some users served through the affected infrastructure who were attempting to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop. Start time: Friday, August 14, 2026, at 5:00 AM UTC End time: Tuesday, August 18, 2026, at 12:00 AM UTC Root cause: A recent deployment introduced a resource utilization inefficiency issue and affected the search functionality in SharePoint Online, OneDrive, Outlook on the web, and the Outlook desktop client. Next steps: - We're further reviewing the recent deployment to understand how the resource utilization inefficiency issue was introduced, and to understand what prevented it from being detected in our update testing and validation procedures, which will allow us to prevent similar issues in future deployments. This is the final update for the event.

Title: Some users may be unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop User impact: Users may be unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop. Current status: Our investigation identified that a recent deployment introduced a resource utilization inefficiency issue, leading to impact. We've developed and are deploying a fix to reduce the resource pressure and restore service. We're monitoring as this progresses to identify a completion timeline. Scope of impact: Impact is specific to some users served through the affected infrastructure who are attempting to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop. This section may be updated as our investigation continues. Start time: Friday, August 14, 2026, at 5:00 AM UTC Root cause: A recent deployment introduced a resource utilization inefficiency issue, leading to impact. Next update by: Friday, August 21, 2026, at 4:00 AM UTC

Title: Some users may be unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop User impact: Users may be unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop. Current status: We're analyzing service telemetry and reviewing recent service changes to determine the cause of impact. We've identified indicators of increased service restarts within a portion of the affected infrastructure, which may be contributing to the issue. We're validating potential remediation options while continuing our investigation into the root cause. Scope of impact: Impact is specific to some users served through the affected infrastructure who are attempting to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop. Next update by: Tuesday, August 18, 2026, at 4:00 AM UTC

Title: Some users may be unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop User impact: Users may be unable to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop. Current status: We're reviewing service monitoring telemetry and support provided information to determine our next troubleshooting steps. Scope of impact: Impact is specific to some users served through the affected infrastructure who are attempting to search for content in SharePoint Online, OneDrive, Outlook on the web, or Outlook desktop. Next update by: Monday, August 17, 2026, at 3:00 PM UTC