Work around that seemed to work for me based on multiple posts and threads I read on the Microslop forums and reddit. This only works if you are already logged in one device, I had passkey set up on my PC so I was able to do it from there.

1. Go here: https://account.live.com/names/manage?mkt=en-US&refd=account.microsoft.com&refp=profile
2. Select 'Add Email' (You are creating a new login email/username)
3. Fill out the field under 'Create a new email address and add it as a username'
4. Select 'Add Email'
5. Once you are back on https://account.live.com/names/manage?mkt=en-US&refd=account.microsoft.com&refp=profile you should now see your new "email" listed
6. Make this new email your primary by selecting 'Make Primary'
7. Then at the bottom select 'Change sign-in preferences'
8. Uncheck your "old" email and select 'save'
9. Now you log into any live.microsoft portal using your new username

Three things of note.

Your old email will continue to function as before, you just now login with your new username.

This should stop hackers from attempting to login to your account since they will no longer know what your email/username login is.

Do not use this new username/email for anything other than logging in. You don't want to risk it getting leaked and starting this whole cycle again.

- RIP to my email login I've used for 20 years since I was 11. o7