Using classic Outlook for Windows in business environments
Hello,
Welcome to the Microsoft community. My name is Rafael Tomaz, I am an independent consultant and I will support you in this case.
There is someone trying to access your account, to help you follow the guidelines and avoid the problem again
In this case we have the following recommendations:
1 - Disconnect your email from all connected places I will leave a reference link on how to perform the procedure:
https://support.microsoft.com/en-us/windows/man... %20with%20your%20account%20Microsoft,your%20device%20and%20select%20Unlink.
2 - Change your password:
https://support.microsoft.com/en-us/office/alte...
3 - Activate two-factor authentication:
https://support.microsoft.com/en-us/account-bil... microsoft-b1a56fc2-caf3-a5a1-f7e3-4309e99987ca
Disclaimer: This is a public user-to-user community forum. None of us here work for Microsoft and it's beyond our ability to help directly with account or login related issues.
Any doubt I am available!
Att.
Rafael Tomaz