Hi @Albert L,
Thank you for raising question to Microsoft Q&A.
Understanding that the verification email is not coming already, may I know if you have tried to change the method of verification for the account you are trying to get access to? As the email address is @hotmail.com, it's pretty hard to track down if the verification ever came to that email. As I am the forum moderator, I do not have the access to internal database to support you with this.
If your Microsoft Authenticator does not have too many accounts before its factory reset - the only way I could say is that you could try with other verification methods.
Please also note that: The backup-restore function just brings back the account lists (For example: you have 6 accounts before factory reset, then it will bring back 6 accounts after restoration process) but not the actual MFA - which means when you try to sign in, those MFA will not pop up. If those accounts in your Microsoft Authenticator are business accounts, you will need to contact the IT Admin/someone who has Global Administrator to reset the MFA for you following this: https://learn.microsoft.com/en-us/entra/identity/authentication/howto-mfa-userdevicesettings.
I have been in this situation many times - and decided not to rely on Backup-restore function as it will not recover the actual MFA whenever you are trying to sign-in.
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