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On March 31st, 2021 at ~1:45 am UTC, Microsoft reported an issue that was preventing users from accessing the Microsoft admin center.
Shortly after Microsoft's initial report, Microsoft tweeted again stating that the issue was affecting users in the United Kingdom, France, and Central United States
On March 18, 2021 at ~4:30 pm UTC, Microsoft reported an issue that was preventing users in EMEA from access Microsoft 365 services.
Users took to Twitter to express frustration with the recent string of outages over the past couple of weeks.
Throughout this post, we will be dissecting the key events of the worldwide Microsoft 365 services outage that spanned over 9 hours on March 15th 2021.
On March 15th, 2021 at 8:40 pm UTC, Microsoft reported an issues that was preventing users from accessing Microsoft 365 services. Shortly after, they confirmed that the issue could be affecting users worldwide.
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.