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On March 10, 2021 at ~9:00 am UTC, Microsoft reported an issues that was preventing users in the UK from accessing Microsoft 365 services.
Shortly after, at ~10:30 am UTC, Microsoft reported that the issue was due to a third-party network interruption and that the third-party network provider had taken corrective action to resolve the issue.
On March 2, 2021 at ~3:00 pm UTC, Microsoft reported an issue that was preventing users in Brazil from accessing Microsoft 365 services.
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On February 25, 2021 at ~3:00 pm UTC, Microsoft reported sign-in issues with Microsoft Stream.
Shortly after, Microsoft reported that the issue was affecting users out of Europe, the Middle East, and Africa regions.
On February 17, 2021 at ~4:00 pm UTC, Microsoft reported an issue that was causing users in North America to experience delays when receiving chat messages within Microsoft Teams.
On February 12, 2021 at ~1:30 am UTC, Microsoft reported an issue that was preventing users from accessing Microsoft Teams.
Shortly after, Microsoft then reported that they were currently investigating a potential networking issue that may be causing various issues.
On February 9, 2021 at ~1:00 am UTC, Microsoft reported an issue that was preventing some users from accessing Yammer and that users may receive an error message when attempting to access services.
On February 4, 2021, at ~4:30 pm UTC, Microsoft reported an issue that was causing some users in North America to experience issues when attempting to join meetings in Microsoft Teams.
Many users took to Twitter to express their frustration due to little information available in the Service Health Dashboard and the multiple issues that had taken place in the past week.
On February 3, 2021 at ~10:45 pm UTC, Microsoft reported an issue that was causing some users in North America to experience issues with Exchange Online.
Many users quickly confirmed they that they weren't experiencing delays but rather emails altogether bouncing as well as error messages claiming service was unavailable.
On February 1, 2021, at ~6:00 pm UTC, Microsoft reported an issue that was causing some users to experience delays when attempting to access Microsoft 365 services.
Many users confirmed they were experiencing this issue throughout the U.S. with what appeared to be a heavy impact in the California region.
On January 27, 2021, at ~9:30 pm UTC, Microsoft gave a first report of an issue that was preventing users from accessing email in the North American region via Exchange Online.
Shortly after, Microsoft reported that they had identified that a recently deployed configuration change to a specific portion of their infrastructure may be the cause of this issue for some users.