Tens of thousands of users reported connectivity failures Friday morning when attempting to reach critical productivity tools and Exchange Online mailboxes through multiple connection methods. Microsoft determined that the disruption stemmed from a sudden loss of server capacity rather than an unexpected surge in external user traffic. In response, engineers paused all regular updates and deployments as a precaution while investigating recent changes. The company continues working to safely restore the unavailable servers and alleviate pressure on the operational infrastructure.
Key points
The disruption was triggered by numerous servers becoming unavailable rather than a sudde…: The disruption was triggered by numerous servers becoming unavailable rather than a sudden spike in network traffic.
Microsoft is restarting affected servers across its network to safely bring infrastructur…: Microsoft is restarting affected servers across its network to safely bring infrastructure back into active service.
The company confirmed it is investigating connection failures that prevent users from rea…: The company confirmed it is investigating connection failures that prevent users from reaching their Exchange Online mailboxes.
Sources checked by our analysis pipeline: 1
Microsoft says it is “aggressively pursuing all pathways” after users reported issues accessing its 365 suite of programs, including Outlook and Teams.
On Friday morning, outage website Down Detector showed a spike in Microsoft 365 problems, with almost 50,000 reports of issues affecting access to Word, Excel, PowerPoint, Outlook and Teams as well as enterprise services such as SharePoint and OneDrive.
Posting on X, Microsoft said it was investigating “investigating reports of users experiencing issues accessing Exchange Online mailboxes through multiple connection methods”.
A service degradation alert on Microsoft’s site said it was “aggressively pursuing all pathways to reduce impact” and said it was “restarting affected servers to return them to service”.
“As a precaution, we’ve paused all deployments and configuration changes while we review recent changes for any correlation to this event.
“We’ve determined that the elevated load isn’t driven by an overall increase in traffic, but by a large number of servers being unexpectedly unavailable, which is shifting load onto the remaining infrastructure.
“We’re investigating what’s causing these servers to become unavailable while we work to safely return…
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