A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
Install the authenticator app, then before adding any accounts sign in to your recovery account to begin restore.
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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