The Microsoft Authenticator lets you quickly and securely verify your identity online, for all your accounts. A variety of features are available depending on the type of accounts.
Two-step verification: Two-step verification helps protect your account by providing an extra layer of security beyond simply your password. Here’s how it works – add your account – either from Microsoft, or any other account that has two-step verification. When signing in, after entering your password, you’ll be asked for an additional way to prove it’s really you. Either approve the notification sent to the Microsoft Authenticator, or enter the verification code generated by the app.
Phone sign-in: Use your phone instead of your password for personal Microsoft accounts! After enrolling your account through the app, you can sign in to your account with only your phone. Just approve the notification sent to the Microsoft Authenticator after entering your username, and provide your passcode or TouchID.
Broker Accounts: Did your work or school organization ask you to install the Microsoft Authenticator when logging in to a Microsoft app or service? The account you created at that time helps you seamlessly and securely access many additional apps and services on this device without needing to log in to each. If you need to set up two-step verification for the same account, you will still need to “add a new account” from this app, and follow instructions provided by your IT Department.