MICROSOFT EXCHANGE ONLINE OUTAGE CAUSES EMAIL FAILURES, AUTH ISSUES

Summary from the TLDR IT newsletter

Microsoft spent Monday battling a widespread Microsoft 365 outage that started with Exchange Online and expanded to Teams, OneDrive, SharePoint, Purview, and Defender XDR. Microsoft traced the disruption to a core authentication configuration problem and was rolling out mitigation across affected infrastructure, with users seeing gradual recovery by late Monday.