Hi I have lost access to my phone that has authentication app. Unable to receive code for one of my account

If you have lost access to your phone that has the authentication app, you can follow these steps to recover your account:

1. Contact an Admin: If you are part of an organization, reach out to your IT administrator or support team. They can reset your Multi-Factor Authentication (MFA) settings, allowing you to set up new authentication methods.
2. Use Account Recovery: If you are unable to reach an admin, you might need to go through the account recovery process. Microsoft Entra ID Account Recovery is designed for situations where users have lost access to all registered authentication methods. This process focuses on identity verification to help you regain access.
3. Reset MFA Settings: If you have another admin available, they can reset your MFA settings by signing into the cloud service portal and managing user settings to require you to provide contact methods again.
4. Alternative Verification Options: If you have set up other verification options, try selecting those on the sign-in page.

Make sure to provide any necessary information to your admin to assist in the recovery process.

References:

• Can't use Azure Multi-Factor Authentication to sign in to cloud services after you lose your phone or the phone number changes
• Overview of Microsoft Entra ID Account Recovery