Two factor authentication (TFA) is easy, convenient, and secure when you use Microsoft Authenticator. Use your phone, not your password, to log into your Microsoft account. Just enter your username, then approve the notification sent to your phone. Your fingerprint, face ID, or PIN will provide a second layer of security in this two step verification process. After you’ve signed in with two factor authentication (TFA), you’ll have access to all your Microsoft products and services, such as Outlook, OneDrive, Office, and more.

We’ve made some improvements to help you securely access additional apps and services without needing to sign in again.

Source: Microsoft Authenticator - Apps on Google Play

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