A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
Hey there, mohammad abusamra
It appears someone knows your email address and is trying to sign in using the authenticator method. What you have done, by changing your password is a good step. This ensures your account is protected.
If this is a Microsoft account, please sign into your account here: https://account.live.com/Activity
Have a look to see if it is coming from the same location. You may also want to generate a recovery code here: https://account.live.com/proofs/manage/additional (scroll down to the bottom).
Apart from that, there is no way of preventing requests coming from a particular source.
Hope this helps,
Nathan