# About [[Microsoft Authenticator]] can be used to sign in to any [[Entra ID]] account without using a password. Microsoft Authenticator uses key-based authentication to enable a user credential that is tied to a device, where the device uses a PIN or biometric. # Direct phone Sign-in registration Users can register for passwordless phone sign-in directly within the Microsoft Authenticator app without the need to first registering Microsoft Authenticator with their account, all while never accruing a password. Here's how: 1. Acquire a [[Temporary Access Pass (TAP)]] from your Admin or Organization. 2. Download and install the Microsoft Authenticator app on your mobile device. 3. Open Microsoft Authenticator and click **Add account** and then choose **Work or school account.** 4. Choose **Sign in**. 5. Follow the instructions to sign-in with your account using the Temporary Access Pass provided by your Admin or Organization. 6. Once signed-in, continue following the additional steps to set up phone sign-in. # Sources [Passwordless sign-in with Microsoft Authenticator - Microsoft Entra | Microsoft Learn](https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-authentication-passwordless-phone)