If you were having problems with opening Outlook or other Microsoft applications yesterday – you weren’t alone. Thousands of Microsoft 365 customers worldwide took to social media to report trouble seeing their emails, loading calendars or opening other Microsoft 365 applications such as Powerpoint and Teams.

Microsoft acknowledged “an issue impacting users attempting to access Exchange Online or functionality within Microsoft Teams calendar” earlier in the day. In updates posted on X, the social media platform formerly known as Twitter, the company’s status page said it identified a “recent change” that it believed to be behind the problem — and was working to resolve it.

Microsoft said it was deploying a fix — which, as of shortly before noon ET., i had reached about 98% of “affected environments.”

Still, the company’s status page later added, targeted restarts were “progressing slower than anticipated for the majority of affected users.”

As of midday Monday, outage tracker Downdetector showed thousands of outage reports from users of Microsoft 365, particularly Outlook.

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