File photo: Microsoft’s building at Atlantic Station in Atlanta, January 29, 2022. Photo: Tyler Lahti / Wikimedia Commons / CC BY-SA 4.0. Cropped and resized. Adapted image: CC BY-SA 4.0.
Microsoft said users may be unable to connect to several Microsoft 365 services Thursday, including the email system behind many business Outlook accounts.
The company’s official service status update, issued at 2:30 p.m. Eastern on November 12, listed Exchange Online, Microsoft Teams, SharePoint Online, Microsoft Copilot 365 and Microsoft Defender XDR as potentially affected services. The status remained “Service degradation” when checked Thursday afternoon.
For businesses, the warning means employees may have trouble reaching email and other tools they use to communicate, share documents and work together. Microsoft did not say that every customer or every service was unavailable.
Microsoft said it had paused all deployments and configuration changes as a precaution while reviewing recent changes for any connection to the incident.
The company said it had determined that the elevated load was not driven by an overall increase in traffic, but by a large number of servers being unexpectedly unavailable, which shifted load onto the remaining infrastructure. Microsoft said it was investigating what was causing the servers to become unavailable while working to safely return them to service.
The update did not confirm a full root cause or give a time when service would be fully restored.
Microsoft said its next update was due by 5 p.m. Eastern. The company also publishes the notice through its official status feed.
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