Microsoft 365 outage: Outlook is down. What we know.


Microsoft 365 suffered an outage on Thursday, affecting U.S. users going about their workday.

Wrote the company on its 365 status page, “Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.”

The issues affected folks using attempting to send or receive email.

“Users may be receiving a ‘451 4.3.2 temporary server issue’ error message when attempting to send or receive email through Outlook,” read the Microsoft status page.

User-reported issues for Microsoft 365 spiked on Downdetector on Thursday afternoon. The reports appeared to be going down as evening, Eastern time, approached. (Disclosure: Downdetector is owned by Ziff Davis, the same parent company as Mashable.)

Microsoft noted it was working toward restoring services.

“While we’ve restored the affected infrastructure to a heathy state, further load balancing is required to mitigate persistent impact,” read its 365 status page. “We’ve identified and are implementing additional actions to direct requests and traffic to additional healthy sections of infrastructure to achieve withstanding recovery.”

Not being able to send or receive emails is, obviously, a major pain for workers. Lots of folks took to social media to voice their frustrations and, of course, make jokes.

This story is developing and will be updated as necessary…





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