Investigating user reports of issues accessing Microsoft 365 services in North America

Title: Users may be unable to access files, applications, or services, which leverage Microsoft OneDrive
User impact: Users may be unable to access files, applications, or services, which leverage OneDrive.
Current status: We’re testing a manual configuration change on a small portion of the machines that support the impacted service infrastructure. If this provides relief from impact, we’ll deploy this change more broadly. In parallel, we’re continuing to look carefully at system logging to further understand the underlying cause of impact and identify potential mitigations.
Start time: Monday, September 8, 2025, at 7:35 PM UTC
Next update by: Tuesday, September 9, 2025, at 2:00 AM UTC

Title: Users may be unable to access files, applications, or services, which leverage Microsoft OneDrive
User impact: Users may be unable to access files, applications, or services, which leverage OneDrive
Current status: The feature change rollback did not fully resolve the issue as anticipated. While we’ve observed some improvement, we’re working to identify additional mitigations to deploy in the service environment to completely remediate the impact.
Start time: Monday, September 8, 2025, at 7:35 PM UTC
Next update by: Tuesday, September 9, 2025, at 12:00 AM UTC

Title: Users may be unable to access files, applications, or services, which leverage Microsoft OneDrive
User impact: Users may be unable to access files, applications, or services, which leverage OneDrive
Current status: We’ve determined that a recent change intended to introduce a new feature caused availability issues on a portion of infrastructure that supports Microsoft OneDrive. We’re working to reverse the change to remediate impact as swiftly as possible. We're seeing positive results from the revert action.
Next update by: Monday, September 8, 2025, at 10:00 PM UTC

Title: Investigating user reports of issues accessing Microsoft 365 services in North America
User impact: We don't have detail on impact yet. We're seeing an increase in user reported issues above our alerting threshold.
Current status: We are reviewing service telemetry and available information to determine if there is an issue happening and we'll update this message shortly with our latest findings.
This communication serves as a preliminary notification about a potential issue affecting your service.