Repeated Unwanted Microsoft Authenticator Login Prompts

Question

Hello,

Someone has been repeatedly attempting to sign in to my account through Microsoft Authenticator. To be clear, this person does not have my password. However, I keep receiving continuous verification prompts.

The issue is that Microsoft Authenticator currently requires number matching rather than a one-time code, which means I receive constant notifications asking me to confirm a number. This has become exhausting and disruptive.

I have already tried disabling Microsoft Authenticator as a verification method, but Microsoft does not allow me to do so. In any case, lowering the security of my account should not be the solution.

At this point, this feels like a form of harassment enabled by the system itself, and I see no clear way to stop these repeated prompts. Could you please advise on how to prevent these unwanted authentication requests?

Thank you.

Answer 1

Hi,

This is happening way too often. Disabling the sign in capability for the alias should help.
https://learn.microsoft.com/en-us/answers/questions/4613233/i-keep-getting-single-use-codes-for-an-email-of-mi?page=5

https://www.yourwindowsguide.com/2025/04/microsoft-single-use-code-email.html

Hiding or disabling the sign-in capability for your email would get rid of the single-use code emails. Hiding it would mean that it is not possible to log in using the same, but you can use it for emailing. For that, do the steps below:

• Make a new Alias for login purposes at this link.
• Next, fix this alias as the primary alias at https://account.live.com/names/manage page.
• Now, the next step is to disable the sign-in capability for the the original email, which is possibly hacked in a data breach. Concurrently, You can manage that on this page. Uncheck the Email and click Save.
• Furthermore, as expected, you can still send and receive email from the old Alias – you have just disabled the capability of it to sign in. Remember to keep the new alias secret or use elsewhere. The dropdown on Outlook apps, like Android and Outlook New on Windowswould show you all your addresses to send an email from.
• Now, when someone would try to use the breached address, they will hit an error. The error message would say that the Email does not exist.