Microsoft 365

Title: Users may experience delays receiving email messages from external domains in Exchange Online User impact: Users may experience a delay in receiving email messages from external domains in Exchange Online. More info: Users may experience intermittent “Server busy” errors, affecting multiple mailboxes. Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 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: Investigating user reports of Exchange Online issues User impact: We don't have details 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.

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: Guest users are unable to access SharePoint Online sites connected to Microsoft Teams User impact: Guest users are unable to access SharePoint Online sites connected to Microsoft Teams. More info: The issue is specifically happening when permissions to the SharePoint Online sites are granted through Microsoft 365 groups. Current status: We're investigating a potential issue with SharePoint Online 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

Title: Some users may be unable to access SharePoint Online sites configured with Authentication Context User impact: Users may be unable to access SharePoint Online sites configured with Authentication Context. More info: Specifically, users are unable to access SharePoint Online sites configured with Authentication Context through sensitivity labels. Current status: We've reproduced the issue in our testing environment and are reviewing HTTP Archive (HAR) logs to determine why direct links fail when Authentication Context is enabled through sensitivity labels. Scope of impact: Some users attempting to access SharePoint Online sites configured with Authentication Context through sensitivity labels may be impacted. Next update by: Monday, August 31, 2026, at 2:30 PM UTC

Title: Users in South America may be unable to use multiple Microsoft 365 services User impact: Users in South America may be unable to access or experience degraded functionality with multiple Microsoft 365 services More info: Impacted services include, but are not limited to: - Microsoft Teams - Outlook - Office Online Apps 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. We'll provide an update in 30 minutes. Scope of impact: The majority of reports are from users in Colombia. We're still assessing the scope of the issue and will update this section as we know more information.

Title: Some users may be unable to send or receive new Exchange Online email through the native iOS mail app User impact: Users may be unable to send or receive new Exchange Online email through the native iOS mail app. Current status: We're reviewing service logs, telemetry, and contextual details provided by impacted users to gain insight into the underlying source of impact and determine our next steps. Scope of impact: Some users attempting to send or receive new Exchange Online email through the native iOS mail app may be impacted. This information may be updated as our investigation continues. Next update by: Tuesday, August 18, 2026, at 5:00 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

Title: Users may be unable to sign in to OneNote using iOS devices User impact: Users may be unable to sign in to OneNote using iOS devices. Current status: We've identified that a recent change to the sign in flow may be causing impact to occur. We've reverted the change but this did not resolve the issue. We're analyzing OneNote logs from impacted users as well as OneNote logs from our internal reproduction of the issue to assist us in identifying the underlying root cause of impact. Scope of impact: Any user attempting to sign in to OneNote build 16.112.717.0 or higher using iOS devices is impacted. Next update by: Friday, August 14, 2026, at 2:00 PM UTC

Title: Potential issues accessing mailboxes via one or more connection methods User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods. Current status: We're investigating a potential issue and checking for impact to your organization. We'll provide an update within 60 minutes.