Once you start the process of configuring the Microsoft Authenticator App, do not use your browser's "Back" button. If you need to stop configuration for any reason, use the “Back” buttons included as part of the configuration process.
After clicking “Next” on the screen above, you will be redirected to the MFA configuration page. Setting up the Microsoft Authenticator App is the default option on this page.
1. Make sure you have the Microsoft Authenticator App on your mobile device. Once installed, click "Next."

2. In the Microsoft Authenticator App, click the icon to add new accounts.

3. In the Microsoft Authenticator App, choose the “Work or School Account” option. This will open your camera with a box highlighted in blue. You will use this to scan your computer screen in Step 6.

4. Back on your laptop or desktop, click “Next” on the “Set up your account” screen.

5. Scan the QR code displayed on your computer screen with the Microsoft Authenticator App. After scanning the code, the view of your camera will disappear in the Microsoft Authenticator App. Click “Next” under the QR code displayed on your computer screen.

6. A notification will be sent to your phone to confirm that the Microsoft Authenticator App was configured successfully. Click “Approve” on the notification to complete setup of the Microsoft Authenticator App.

7. When you have approved the notification on your phone and configuration is successful, the page on your computer screen will update to indicate that you approved the notification. Click “Next” to review your MFA configuration.

8. Review the information you configured and click "Done" to complete MFA configuration.

These steps will configure your account to use the "Mobile App with a Notification" option by default. If you want to use the "Mobile App with a Verification Code" option by default, please follow the instructions in How to Change the Default Multi-Factor Authentication Option.