Microsoft 365

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: Some users may be unable to receive responses when using Microsoft 365 Copilot Chat User impact: Users may be unable to receive responses when using Copilot Chat. More info: Affected users may receive error messages stating that a problem has occurred or that Copilot could not respond. Current status: We've received reports indicating an issue with Copilot Chat where some users may be unable to receive responses to prompts. We're reviewing service monitoring telemetry to isolate the root cause and determine our next troubleshooting steps. Scope of impact: Your organization is affected by this event, and some users attempting to use Copilot Chat may be impacted. This information may be updated as our investigation continues. Next update by: Tuesday, August 25, 2026, at 10:30 AM UTC

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: Some users may be unable to access Microsoft Viva Glint services User impact: Users may be unable to access Viva Glint services. More info: Affected users are able to log in as expected but may see a blank page and won't be able to access any Viva Glint services. Current status: We're investigating a potential issue with Viva Glint 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: 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: We're looking into a potential problem impacting Microsoft 365 Copilot Chat User impact: We're checking for potential impact to your users. Current status: We're investigating a potential issue impacting Copilot and checking for impact to your organization. We'll provide an update within 30 minutes.

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.

Title: Users may be unable to join Microsoft Teams live events using the iOS mobile app User impact: Users may be unable to join Microsoft Teams live events using the iOS mobile app. More info: While we're working to remediate impact, affected users can join Teams Live Events using the Microsoft Teams Android, desktop, or web clients. 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 access Microsoft Copilot Chat in the browser and may encounter a 400 Request Header error User impact: Users may be unable to access Microsoft Copilot Chat in the browser and may encounter a 400 Request Header error. More info: As a temporary workaround, affected users may be able to restore access to Microsoft Copilot Chat by clearing their browser cookies and then trying again. Current status: We're reviewing service monitoring telemetry to isolate the source of the issue and establish a fix. Scope of impact: Impact is specific to some users attempting to access Microsoft Copilot Chat in the browser.

Title: Some users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users User impact: Users may be unable to create or publish Microsoft Teams town hall or webinar events that include guest users. Current status: We're reviewing service monitoring telemetry to isolate the source of the issue and establish a fix. Scope of impact: Impact is specific to some users attempting to create or publish Microsoft Teams town hall or webinar events that include guest users. Next update by: Wednesday, July 29, 2026, at 9:30 AM UTC