Microsoft is currently experiencing a major service disruption affecting several Microsoft 365 services. This includes Outlook, Microsoft Teams, SharePoint Online and Microsoft 365 Copilot.
According to Microsoft’s latest update, users may be unable to access multiple Microsoft 365 services due to an ongoing infrastructure issue.
There has also been a significant spike in user-submitted outage reports on Downdetector for Microsoft Outlook, Microsoft 365 and Microsoft Copilot.
Which Microsoft 365 services are affected?
Besides Outlook, Teams, SharePoint Online and Microsoft 365 Copilot, other potentially affected services include Microsoft Defender XDR, Planner, To Do, Intune, Purview, Power BI and Universal Print.
The disruption could prevent users from accessing emails, joining Teams meetings, opening documents stored on SharePoint or using other Microsoft 365 services normally.
What’s causing the Microsoft 365 outage?
Microsoft initially identified elevated infrastructure load as the cause of connectivity errors across multiple regions.
Further investigation revealed that a significant number of servers had unexpectedly become unavailable, forcing the remaining infrastructure to handle more traffic.
In its latest update at 6:03am local time today, Microsoft said a core process on affected servers was becoming overwhelmed, causing them to stop responding and reducing overall capacity.
Microsoft is working to restore services by isolating affected infrastructure, restarting components and gradually reintroducing traffic to verify stability.
The company has also paused deployments and configuration changes while investigating possible contributing factors. However, the underlying root cause has not been confirmed.
Microsoft has not provided a confirmed timeline for full service restoration. Users can check the latest status from Microsoft’s Service Health Status page.
