My backup email no longer exists - how do I change it?

To change your backup email and mobile number for your Microsoft account, you will need to regain access to your account first. Since you cannot receive verification codes at your backup email or mobile number, follow these steps:

1. Account Recovery Form: Go to the Microsoft account recovery page at https://account.live.com/acsr. Fill out the recovery form with as much accurate information as possible. This includes recent email subjects, folder names, and contacts you’ve emailed.
2. Alternative Recovery Options: If you have other recovery options set up, such as another email address or a different phone number, use those to receive the verification code.
3. Contact Microsoft Support: If you are unable to recover your account using the recovery form, you may need to contact Microsoft Support for further assistance. You can do this by visiting https://support.microsoft.com/contactus and selecting the appropriate options for account recovery.
4. Updating Information: Once you regain access to your account, you can update your backup email and mobile number in the security settings of your Microsoft account.

Please note that if you have two-step verification enabled, you will need to verify your identity using one of your recovery methods before you can make these changes.

References:

• Can't sign in to my email - Microsoft Q&A
• I need to speak with a real person and it seems impossible. - Microsoft Q&A