Outlook outage continues as Microsoft works to restore email service

Microsoft's Outlook email service remains unstable on Friday after an outage began Thursday, caused by unexpected server failures that overloaded remaining infrastructure and disrupted access for Microsoft 365 users. The outage affects Exchange Online, impacting Outlook in browsers and desktop apps, with recovery hampered as restarted servers failed again under traffic. Microsoft applied a fix to an authentication component Friday morning, reporting improvement, and is gradually expanding the measure. No malicious activity is suspected, according to Microsoft, which is investigating the root cause and will publish a report after recovery. No restoration timeline has been announced, and related features in Teams, Copilot, and SharePoint may also be affected.