Using Outlook for Android in business environments for email and scheduling
Hello,
Thank you for reaching out to the Microsoft Community and I'll be glad to assist you today.
Did you delete the email address (Alias) from your Microsoft account and replaced it with something new due to the attack?
If yes, the answer is 'No'. You cannot recover the deleted Microsoft domain alias.
That is, Microsoft domain addresses like @outlook.com, @hotmail.com, @live.com, @msn.com are removed, you are permanently deleting the alias and it cannot be associated with any Microsoft account again.
Since Microsoft no longer recycle email addresses, you cannot recreate the same address again, and this username will not be available to anyone again in the future.
Reference:
https://support.microsoft.com/help/459b1989-356...
Let me know if you still need more help.