Microsoft 365 Outage Disrupts Outlook, Teams, Copilot and Other Services Worldwide
A major technical issue linked to Exchange Online is affecting multiple Microsoft 365 services, while Microsoft works to restore stability.
Microsoft is working to resolve a major technical issue affecting several Microsoft 365 services, leaving users unable to access important business applications and online tools.
The disruption is linked to Exchange Online, Microsoft’s cloud based email platform. As a result, users may experience problems accessing Outlook through web browsers and desktop applications, while some emails may be delayed.
The issue is also affecting several other Microsoft services, including the Microsoft 365 admin centre, Copilot, Microsoft Defender, SharePoint, Power BI, Planner, To Do and Microsoft Teams.
Outlook and Teams Users Face Service Disruptions
Outlook users may be unable to access their mailboxes, send or receive emails reliably, or connect through different devices.
Microsoft Teams continues to support most of its core functions, including calls, meetings, group chats and standard channel messaging. However, features connected to Exchange Online are experiencing difficulties. These include calendar access, meeting invitations, scheduling and editing meetings.
Some users may also face problems creating private or shared channels, managing contacts and accessing certain application features.
Copilot and Other Microsoft Applications Affected
Microsoft 365 Copilot users may experience difficulties opening Copilot Chat or receiving responses through web and desktop applications. Access to workplace information, including emails, calendars and files, may also be disrupted.
Other affected services include Microsoft Intune, Microsoft Purview, Microsoft Fabric, Microsoft Graph, Microsoft Power Apps and Microsoft Defender.
Users may also encounter problems with document sharing, report exports, device registration, security management and administrative functions.
Microsoft has clarified that services and features that do not rely on Exchange Online may continue to operate normally. For example, files stored directly in SharePoint Online remain accessible.
Microsoft Reports Improvement in Server Stability
In its latest update, Microsoft reported positive progress following the application of a technical patch to part of its infrastructure.
The update addresses an authentication and routing configuration issue affecting server stability. Microsoft is monitoring the results and working to extend the fix to additional servers supporting active regions.
The company also confirmed that it has not identified any malicious activity behind the incident.
Microsoft said it would continue treating the disruption as a high priority until all affected services are fully restored.
Once the incident is resolved, the company plans to publish a detailed report explaining the root cause, corrective measures and additional security improvements introduced to prevent similar problems in the future.