Widespread Microsoft outage takes down Outlook and other 365 services
A Microsoft outage on Thursday affected users of services like Outlook, Teams and 365.
TL;DR
- Microsoft 365 services experienced a global outage starting Thursday and continuing into Friday.
- Affected services included Outlook, Teams, SharePoint, and Copilot.
- External services integrated with Outlook, such as Calendar, were also impacted.
- Microsoft initially cited elevated infrastructure load as the cause.
- The root cause was identified as unexpectedly unavailable servers straining remaining infrastructure and failing health checks.
- Microsoft confirmed no awareness of malicious activity.
- The company implemented alternative service health checks and is preparing automated recovery systems.
- Amazon Web Services and Google users also reported outages on Thursday, though Amazon stated their services were normal and unrelated.