The Microsoft Authenticator app helps you sign in to your accounts when you're using two-step verification. Two-step verification helps you to use your accounts more securely because passwords can be forgotten, stolen, or compromised. Two-step verification uses a second step like your phone to make it harder for other people to break in to your account. You can use the Authenticator app in multiple ways:

• Two-step verification: The standard verification method, where one of the factors is your password. After you sign in using your username and password, you can either approve a notification or enter a provided verification code.
• Phone sign-in. A version of two-factor verification that lets you sign in without requiring a password, using your username and your mobile device with your fingerprint, face, or PIN.
• Code generation. As a code generator for any other accounts that support authenticator apps.

Authenticator works with any account that uses two-factor verification and supports the time-based one-time password (TOTP) standards.

Download and install the app

Install the Authenticator app

1. To install the Authenticator app on an Android device, scan the QR code below or open the download page from your mobile device.

Android QR code to open app store

2. To install the Authenticator app on For iOS, scan the QR code below or open the download page from your mobile device.

iOS QR code to open the App Store