Microsoft's efforts to resolve a multi-day outage affecting Outlook and other Microsoft 365 services are entering a second day. The company reported significant progress on Monday after an issue with Exchange Online caused email delays, authentication problems, and other issues for some users.
As of Tuesday, the problems are not fully resolved. Microsoft's latest update on X said mitigation actions are continuing to progress, and telemetry indications remain positive. The company said it is now in a period of extended monitoring to ensure a full resolution.
The outage also affected other services, including SharePoint, Copilot, Teams, Purview, Defender XDR, the Microsoft 365 Admin Center, and Universal Print. Microsoft attributed the issues to a misconfiguration that prevented authentication components from deploying as expected to part of its infrastructure.
By 10 p.m. ET on Monday, mail flow was improving but search functionality remained degraded. Shortly after 3 a.m. ET on Tuesday, Microsoft said search functionality was also improving.