Microsoft Outlook Account Blocked by Incorrect Security Warning

I have been actively using my Outlook account for some time, but I have been unable to access it for approximately one hour. When I try to sign in, the system displays a warning as if the account has been accessed from another device or application, and it therefore prevents me from signing in. However, I have not logged into my account from any other device or application.

This situation is concerning me from a security perspective, and I am also experiencing significant inconvenience because I cannot access my account. Although I contacted Microsoft/Outlook support, the responses I received were neither clear nor satisfactory. I was told that the account may have been accessed from another device, but this is definitely not the case.

I request that my access to my Outlook account be safely restored and that this incorrect security warning be thoroughly investigated so that the issue can be permanently resolved.