Managing personal Outlook.com account settings, security, and privacy
@john gallagher said
My account was recently hacked and my email name was changed ... I am not longer receiving emails due to the name change. The backup email info was also changed ... can have the email switched back to my email name and not what the hackers made it
If your old email address ended with outlook.com (i.e. did NOT end with hotmail.com, live.com, or msn.com) and you can logon to your account and get to https://account.live.com/AddAssocId then you can add back your old email.
See the Answer by "Hornblower409 Aug 11, 2026" in
https://learn.microsoft.com/en-us/answers/questions/5971009/removed-outlook-com-account-by-mistake-how-do-i-re
And then make it your Primary alias.
https://account.live.com/names/manage
The backup email info was also changed.
For that go to https://account.live.com/proofs/manage/additional