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Microsoft pauses deployments amid widespread Outlook outage

Downdetector recorded over a hundred thousand outage reports as Microsoft investigated why servers had unexpectedly become unavailable.

By Mei Ling Tan

Email interface on a computer screen
Photo: 9to5 / Gawk

A widespread outage hit Microsoft Outlook, prompting Microsoft to suspend deployments and configuration changes while investigating the disruption. Downdetector reported over a hundred thousand reports of problems with the email service.

Microsoft attributed the increased pressure on its infrastructure to many servers unexpectedly becoming unavailable. That had transferred demand to the servers still operating, the company said, rather than reflecting an overall rise in traffic.

The company said it was examining why the affected servers were unavailable and working to restore them safely. It described the suspension of deployments and configuration changes as a precaution while it checked whether recent changes were connected to the outage.

Service checks indicated that the disruption remained widespread and ongoing. The page normally used to check Outlook’s status also appeared possibly unavailable. Microsoft said it was pursuing multiple approaches to reduce the impact.

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