Microsoft has confirmed that Microsoft 365 services are currently down. The company confirmed this via its official Microsoft 365 Status X handle. As such, users will be unable to access various apps on the web. The company has informed that you can get status updates regarding the progress of the bug on the Microsoft 365 Admin Center portal with issue ID "OO953223".
We’re investigating an issue where some users may be unable to access Microsoft 365 apps for the web. We"re reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan. For more information, please refer to OO953223 in the admin center.
— Microsoft 365 Status (@MSFT365Status) December 10, 2024
The official Microsoft 365 Service Health Status website currently lists there is no issue with "everything up and running". However, the page will likely be updated soon to reflect the situation.
From the user comments on the M365 Status X thread, it appears that the Microsoft 365 Admin Center portal is also inaccessible and the session may be getting signed out as well as a result of this issue.
We will update the post once more details are available.
Update, December 10 2024, 19:00 IST: Microsoft says that it is looking into the root cause and has also provided a potential workaround:
While we focus on identifying the root cause, as a workaround, users may be able to access their Microsoft 365 apps and documents via the desktop applications. For more information, please refer to OO953223 in the admin center.
— Microsoft 365 Status (@MSFT365Status) December 10, 2024
Update, December 10 2024, 20:25 IST: Microsoft has closed the issue after confirming earlier that it was a token generation bug. The company has thus deployed a fix by disabling proactive caching:
We’ve identified a token generation issue which may be contributing towards the impact. We’ve deployed a fix to disable proactive caching, which we believe will resolve the issue. For more information, please refer to OO953223 in the admin center.
— Microsoft 365 Status (@MSFT365Status) December 10, 2024
The issue stands as resolved:
We’ve confirmed after a period of monitoring that the issue is now resolved. For more information, please refer to OO953223 in the admin center.
— Microsoft 365 Status (@MSFT365Status) December 10, 2024