Microsoft says it was investigating connectivity issues affecting Exchange Online mailboxes and other Microsoft 365 services on Thursday.
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A widespread outage disrupted Microsoft platforms on Thursday, with many users reporting trouble accessing Outlook and errors across the company’s app suite.
As of around 1:30 p.m. ET, Downdetector reported more than 120,000 users experiencing problems with Outlook, including reports they could not send and receive emails or saw delays.
Thousands of users also reported issues with Microsoft’s workplace messaging app Teams, its AI assistant Copilot and wider Microsoft 365 services.
In updates posted on social media, Microsoft said it was aware of users “experiencing issues accessing Exchange Online mailboxes through multiple connection methods in the Americas.”
Microsoft later said a portion of its infrastructure was “experiencing elevated load,” which it said was “likely contributing to the connectivity errors,” and that it would begin ”redistributing” traffic to help balance the load.
The company said it had confirmed the issue “may affect Microsoft 365 service connectivity for users in any region,” and that more information would be provided in the Microsoft 365 admin center under EX1550543.
Earlier in the day, Microsoft said it had “successfully restored” problems related to Microsoft Teams in North America, though some users continued to report connectivity issues.
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