Resetting Microsoft Authenticator

Question

My Microsoft Authenticator is still linked to my old phone (lost it) - how can I reset it?

Answer 1

I have 2 ideas man

Option A: With Backup Codes

Use Backup Codes: If you have backup codes saved when you first set up Microsoft Authenticator, use one of those codes to log in.

Option B: Using Alternative Methods

Secondary Email or Phone Number: Use the alternative methods you set up during the initial configuration (e.g., a secondary email address or phone number).

Account Recovery: Visit the Microsoft account recovery page here and follow the prompts to regain access to your account.

Answer 2

You can restore from backup (assuming there was one) but make sure no accounts have been added to the newly install app. Then sign on with recovery account to do the restore.

You can recover your account credentials from your cloud account, but you must first make sure that the account you're recovering doesn't exist in the Microsoft Authenticator app. For example, if you're recovering your personal Microsoft account, you must make sure you don't have a personal Microsoft account already set up in the authenticator app. This check is important so we can be sure we're not overwriting or erasing an existing account by mistake.
https://support.microsoft.com/en-us/account-billing/back-up-and-recover-account-credentials-in-the-authenticator-app-bb939936-7a8d-4e88-bc43-49bc1a700a40

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