Technology
Microsoft 365 outage improves after core configuration failure
Services including Outlook, Teams, and SharePoint face ongoing monitoring following multi-day disruptions.
The short version
- A core authentication configuration issue caused a multi-day disruption across Microsoft 365 services, including Outlook, Teams, and SharePoint.
- Microsoft implemented mitigations that restored mail flow and search functionality, though services remained under extended monitoring.
- The timeline for complete resolution and full restoration across all affected infrastructure remains unconfirmed.
Key facts
- A multi-day Microsoft 365 outage impacted multiple enterprise services, including Outlook, SharePoint, Teams, Defender XDR, Purview, Copilot, Universal Print, and the Admin Center.[TechCrunch]
- Microsoft attributed the outage to a core authentication configuration issue that blocked authentication components from deploying correctly to portions of its infrastructure.[TechCrunch]
- Mail flow performance improved by Monday evening, followed by search functionality improvements early Tuesday morning as mitigations rolled out.[TechCrunch]
- Microsoft stated that positive telemetry prompted a period of extended monitoring to ensure service availability is fully restored.[TechCrunch]
What remains uncertain
- Microsoft has not formally announced when all affected services will achieve full recovery and return to normal operations.[TechCrunch]