Microsoft 365

Title: Some users may experience unexpected application crashes for Microsoft Teams on macOS devices User impact: Users may experience unexpected application crashes for Microsoft Teams on macOS devices. More info: Impact is specific to users who have updated to their macOS devices to version 27.2 beta. Current status: We've identified a significant increase in Microsoft Teams application crashes affecting macOS devices on version 27.2 beta and are investigating the underlying cause. We're continuing our analysis of crash telemetry and related diagnostic data to determine the source of impact and develop a remediation plan. Scope of impact: Impact is specific to users experiencing unexpected application crashes for Microsoft Teams on version 27.2 beta macOS devices. Next update by: Friday, September 18, 2026, at 3:30 PM UTC

Title: Some users in the United States may be unable to access Microsoft 365 services User impact: Users in the United States may be unable to access Microsoft 365 services. Current status: We're reviewing service monitoring telemetry and associated reports to isolate the root cause, in order to develop a remediation plan. Scope of impact: Impact is specific to users in the United States attempting to access Microsoft 365 services. This information may be updated as our investigation continues. Next update by: Wednesday, September 16, 2026, at 3:30 PM UTC

Title: Some users may intermittently be unable to launch Microsoft Teams from the web or desktop clients User impact: Users may intermittently be unable to launch Microsoft Teams from the web or desktop clients. Current status: We're investigating a potential issue in which some users may intermittently be unable to launch Microsoft Teams from the web or desktop clients and checking for impact to your organization. We'll provide an update within 30 minutes.

Title: Some users may see the Teams chat icon is missing when using the new chat and channels experience in Microsoft Teams User impact: Users may see the Teams chat icon is missing when using the new chat and channels experience in Microsoft Teams. More info: All Microsoft Teams clients are impacted. Current status: We're investigating a potential issue with Microsoft Teams and checking for impact to your organization. We'll provide an update within 30 minutes.

Title: Users may be unable to join calls or meetings in Microsoft Teams for Mac User impact: Users may be unable to join calls or meetings in Microsoft Teams for Mac. Current status: We're investigating a potential issue with Microsoft Teams and checking for impact to your organization. We'll provide an update within 30 minutes.

Title: Users may experience issues when utilizing multiple Microsoft 365 services User impact: Users may experience issues when utilizing multiple Microsoft 365 services. 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. 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: -Users may be unable to connect to, or experience degraded functionality, with Exchange Online. All connection methods are affected. Microsoft Teams: -Users may experience issues with calendar functionality and search. Users’ presence may be stale and not update automatically or through manual adjustment. User location adjustment may fail. Microsoft Purview: -Users may face intermittent authorization failures across solutions in Purview. Purview admins can’t access the portal. Additionally, in Microsoft Purview Communication Compliance, users may see errors when loading Communication Compliance policies and Data Loss Prevention (DLP) policies. Communication Compliance policy creation and evaluation may be delayed. Microsoft Defender XDR: -Users may experience intermittent authorization failures across solutions in Defender. Current status: We've identified issues related to a core authentication configuration used by multiple Microsoft 365 services which is resulting in the impact outlined above. We've identified a potential remediation and we're performing tests to ensure its efficacy before applying it more broadly. Scope of impact: Users attempting to perform any of the outlined impact scenarios may be affected by this event. Next update by: Monday, August 31, 2026, at 6:30 PM UTC Preliminary root cause: An issue within a core authentication configuration used by multiple Microsoft 365 services is resulting in impact. Next update by: Monday, August 31, 2026, at 7:30 PM UTC

Title: Some users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams User impact: Users with an active Microsoft Teams license may be unable to sign in to Microsoft Teams. More info: Additionally, admins may be unable to access organization-wide settings. Current status: We’ve received reports that some users with an active Microsoft Teams license are unable to sign in to Microsoft Teams. Our assessment has determined that a recent authorization configuration change intended to block users without active licenses is resulting in impact. We’re validating a remediation action to revert the offending change and will provide a resolution timeline once available. Scope of impact: Impact may occur for some users with an active Microsoft Teams license who are attempting to sign in to Microsoft Teams. This information may be updated as our investigation continues. Root cause: A recent authorization configuration change intended to block users without active licenses inadvertently blocked some users with active Microsoft Teams licenses, resulting in impact. Next update by: Thursday, August 27, 2026, at 10:30 PM UTC

Title: Users may be unable to join and create Microsoft Teams meetings User impact: Users may be unable to join and create Microsoft Teams meetings. Current status: We're investigating a potential issue with Microsoft Teams and checking for impact to your organization. We'll provide an update within 30 minutes.

Title: We're looking into a potential problem impacting Office 365 apps User impact: We're checking for potential impact to your users. Current status: We're investigating a potential issue with Office 365 apps activations and checking for impact to your organization. We'll provide an update within 30 minutes.

Title: Some users experience degraded video quality when screensharing in Microsoft Teams User impact: Users experience degraded video quality when screensharing in Microsoft Teams. Current status: We've received user reports indicating some users are experiencing degraded video quality when screensharing in Microsoft Teams. We're reviewing service logs and contextual details provided by your representatives to gain insight into the affected scenario and determine our next investigative steps. Scope of impact: Your organization is affected by this event, and users attempting to screenshare in Microsoft Teams are impacted. This information may be updated as our investigation continues. Next update by: Monday, August 24, 2026, at 7:00 AM UTC