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Outlook and Teams under Microsoft 365 experienced a massive crash in multiple locations around the world, affecting thousands of users; Microsoft is troubleshooting Exchange Online issues and gradually restoring affected services.
Data from online service reporting platform Downdetector.com shows that,Microsoft 365, Outlook and Teams services suffered a massive outage, affecting thousands of users in multiple regions around the world.
These services began to be disrupted at approximately 1 a.m. ET on the 12th (Taiwan time on the 13th), shortly before 2 a.m. ET. At that time, more than 130,000 users reported Outlook problems to Downdetector.com.Amazon AWS andGoogle Users also started reporting service interruptions.
After that, the number of users reporting Outlook problems continued to decline, and by about 9:30 on the 13th, Taiwan time, it had dropped to about 31,000.
“We are aware of and investigating issues with Microsoft 365 services, primarily Exchange Online,” Microsoft said. “While we work hard to restore services as quickly as possible, we also thank our customers for their patience.” Microsoft is also sharing the latest status of the service on Microsoft 365 status accounts on social media.
Microsoft initially said that the connection problem was caused by “some servers unexpectedly failing to connect” and failing to automatically check health status, resulting in high infrastructure workload in several regions. “We have taken steps to prevent more servers from being impacted, and are working hard to restore affected servers to service.”
At 5 am on the 13th, Taiwan time, Microsoft said that it has verified the alternative account health check method service and brought some of the affected servers back online. “We are adopting this adjustment more broadly.” “We are also preparing to automatically restore systems, detect and restart unresponsive servers, and maintain service stability while making adjustments.”
Amazon said its service was “operating normally” and that “some false news reports resulted from irrelevant interference on the Internet.”
Summary FAQ
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Affected primarily are Microsoft 365, Outlook, and Teams, and it has affected thousands of users in many regions around the world. Downdetector also showed that the number of Outlook reports once exceeded 130,000 people.
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Microsoft said the problem is primarily in servers related to Exchange Online. Some servers unexpectedly failed to connect, causing health checks to fail to execute automatically, resulting in increased infrastructure workload at multiple locations.
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Microsoft has verified an alternative account health check method, brought some servers back online, and is preparing to automatically restore systems. Amazon insisted that AWS was operating normally and denied that outsiders had confused it with interference.
