Microsoft Email Services Recovering from Global Outage
Microsoft's email services were disrupted globally due to a technical issue on Monday. The outage affected Exchange Online and several other Microsoft 365 services, including OneDrive for Business, SharePoint Online, Teams, Microsoft Purview, and Microsoft Defender XDR.
The cause was traced to an authentication configuration used by internal services within the Exchange Online infrastructure. Microsoft engineers conducted manual tests on individual servers before expanding remedial measures across the affected infrastructure.
User reports indicated that mailbox connectivity had returned to expected service levels following the deployment of mitigation measures, but search functionality remained impaired.