Overview
- Microsoft attributed the disruption to a portion of dependent service infrastructure in North America that was not processing traffic as expected.
- The affected infrastructure has been restored to a healthy state, and Microsoft is performing additional load balancing and routing that may cause intermittent impact during recovery.
- Outlook users reported a “451 4.3.2 temporary server issue” and saw degraded Exchange Online mail flow, delayed or failed message traces, and slowed or incomplete searches in SharePoint and OneDrive.
- Access to service portals such as Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center was intermittently affected, and some Teams features like creating chats or meetings and viewing presence were degraded.
- User reports on Downdetector spiked to the tens of thousands in the afternoon ET, and Microsoft directed customers to incident MO1221364 in the admin/status center for updates, with no firm ETA for full normalization.