Microsoft Admin Center

Update timeline

1. monitoring Sep 02, 2026, 01:32 AM UTC

   More info: Impact includes, but may not be limited to, the below services and scenarios. We will update this list as our understanding of the issue progresses. Microsoft 365 Copilot: - Users' Copilot prompts that require Microsoft 365 grounding, such as email content, may fail. - Users may experience failures for scenarios that rely on access to Exchange Online data. - Users prompts may fail or they may experience degradation when utilizing Cowork. OneDrive for Business and SharePoint Online: - Users may be unable to load or refresh portions of OneDrive and SharePoint, including account and storage information, search results, Favorites, Followed and Shared With Me content, recent files, lists, and news. - Some users may also experience delayed or failed file opening, Office policy-label retrieval, OneDrive synchronization, mobile camera upload, and video playback. - Users may see partial page failures, missing or stale content, repeated retries, and operation timeouts rather than a complete platform outage. Exchange Online: - Service telemetry indicates recovery of core mail flow and search functionality. - Users may be unable to connect to, or experience degraded functionality, such as failures when attempting to use the search function, within Exchange Online. All connection methods are affected. - Users may be unable to connect to Exchange Web Services (EWS) Outlook for iOS and Android: - Delays or failures when sending or receiving email messages via Outlook for iOS and Android. Microsoft 365 Admin Center: - Admins may experience issues authenticating into the admin center. Universal Print: - Users may be unable to create, upload, or retrieve print jobs. Microsoft Graph: - Users may experience failures for scenarios that rely on access to Exchange Online data. Resolved Microsoft Purview: - Users can now access the Microsoft Purview portal. - Any policy hits, alerts, or processing activities delayed during the event are expected to appear over the next 24 to 48 hours as recovery validation continues. - Additionally, in Microsoft Purview Communication Compliance, users may have experienced errors when loading Communication Compliance policies and Data Loss Prevention (DLP) policies, and policy creation or evaluation delays. Microsoft Defender XDR: - Users may have experienced intermittent authorization failures across solutions in Defender. Microsoft Teams: - Users may have experienced issues with search and users’ presence may be stale and not update automatically or through manual adjustment. User location adjustment may have failed. - Users may have experienced issues with Microsoft Teams Room (MTR) devices and desktop phones displaying as offline in the Teams admin center. - Users may have experienced issues creating, deleting, and editing Teams channels. - Users may have experienced issues with calendar functionality. Microsoft 365 Copilot: - Users' Copilot prompts that require Microsoft 365 grounding, such as email content, may fail. - Users may experience failures for scenarios that rely on access to Exchange Online data. - Users prompts may fail or they may experience degradation when utilizing Cowork. Current status: We're continuing to closely monitor service health as we carefully expand our reiterative corrective actions across additional regions. This work involves re-deploying our targeted fixes to the dependent authentication components to ensure service resilience, while balancing ongoing traffic patterns to avoid additional residual impact. Most users should see recovery across the majority of impacted scenarios, though some scenarios, including those reliant on Graph API and Representational State Transfer (REST) connection methods, will remain degraded until our mitigation efforts are complete. Scope of impact: Users attempting to perform any of the outlined impact scenarios may be affected by this event. Start time: Monday, August 31, 2026, at 3:08 PM UTC Root cause: An issue within a core authentication configuration used by multiple Microsoft 365 services is resulting in impact. Next update by: Wednesday, September 2, 2026, at 3:30 AM UTC