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Hi @Zahira A
Thanks for reaching out about this 401 error you're getting when trying to log into Outlook.
Please understand that our forum is a public platform, and we will modify your question to cover your ID in the description. Please notice to hide these personal information next time you post error or some information to protect personal data.
I completely understand how frustrating it is to get locked out of your inbox, especially when everything was working fine just before. You're definitely not alone in facing this.
The Error 401 you're seeing is part of a known issue that Microsoft has officially acknowledged. It's currently affecting Outlook logins across various platforms, including desktop, mobile, and web. This means the problem isn't related to anything on your end, and you haven't done anything wrong!
Microsoft has identified this as a known issue and they are actively investigating it. It appears to be affecting multiple users globally.
You can monitor the current service status via the Microsoft 365 Service Health Dashboard at this link: Microsoft service health status
At the moment, no action is needed on your part. Once Microsoft rolls out the fix, everything should return to normal automatically, and you'll be able to access your emails again.
Again, I truly appreciate your patience and understanding while Microsoft works to resolve this. If you have any other questions or need help with something else in the meantime, I'm here for you.
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