Microsoft is rolling back a recent change to its authentication system that caused problems for thousands of users of its services, including workplace messaging app Teams.
Outage tracking website Downdetector.com showed that more than 9100 people had reported issues with Teams, while over 1100 users posted about problems with Office 365.
Microsoft said initial reports indicated that the primary impact was to Teams, but other services, including its Exchange Online email hosting platform, were also affected.
More than 2300 people also reported problems with Microsoft's Azure cloud computing services, according to Downdetector.
Downdetector only tracks outages by collating status reports from a series of sources, including user-submitted errors on its platform. The outage might be affecting a larger number of users.
We're investigating an issue for access to multiple M365 services. Please visit the admin center post M0244568 for more information. We'll provide additional information here as it becomes available.— Microsoft 365 Status (@MSFT365Status) March 15, 2021