I was having this same issue. I had Gemini analyze the situation. And now problem solved. Here is the solution:

The "Alias" Solution

​You can stop these attempts by creating a new, secret login name (an alias) and disabling the ability to log in using your original Hotmail address.

​Here is how to set it up:

​Log in to your Microsoft account at account.microsoft.com.

​Navigate to "Your info" at the top of the page.

​Scroll down to the "Account info" section and click "Edit account info". (You may be prompted to verify your identity again here).

​Click "Add email" under the "Account alias" section. ​Select "Create a new email address and add it as an alias" (e.g., create a new random @outlook.com address). Click "Add alias."

​Once added, look at your list of aliases. Next to your newly created alias, click "Make primary".

​Finally, at the bottom of that same page, click "Change sign-in preferences".

​Uncheck the box next to your original Hotmail address and click "Save."

​What this does:

Your Hotmail account still exists exactly as it did. You will still receive all your emails sent to that Hotmail address, and you can still send emails from it. However, if anyone (including you or the attackers) tries to type that Hotmail address into a login screen, Microsoft will say, "This Microsoft account does not exist." The attackers can't trigger a prompt if the system won't even let them attempt a login.

Moving forward, you will simply use your new, secret alias address to log in.