How to Add Microsoft Authenticator as an MFA Method to Your Microsoft 365 Account
Step 1: Install the Microsoft Authenticator App
- On your mobile device, go to the App Store (iPhone) or Google Play Store (Android).
- Search for Microsoft Authenticator.
- Tap Get/Install and wait for the app to finish installing.
Step 2: Sign In to Your Microsoft Account Security Settings
- On your computer, open a browser and go to: https://mysignins.microsoft.com/security-info
- Sign in with your Microsoft 365 email and password.
Step 3: Add a New Sign-In Method
- On the Security info page, click + Add sign-in method.
- In the pop-up window:
- Select Authenticator app from the dropdown.
- Click Add.
Step 4: Set Up the App
- A prompt will appear asking how you want to set up the app. Choose:
- “I want to use a different app” (only if you're not using the Microsoft Authenticator app),
- Otherwise, click Next to continue with Microsoft Authenticator.
- A QR code will appear on your screen.
Step 5: Set Up Microsoft Authenticator on Your Phone
- Open the Microsoft Authenticator app.
- Tap + (Add account), then choose Work or school account.
- Tap Scan a QR code and point your camera at the QR code displayed on your computer screen.
- If scanning doesn’t work, you can choose to enter the code manually using the information on your screen.
Step 6: Complete the Setup
- Once the QR code is scanned, the app will add your account and show a 6-digit code.
- Back on your computer, click Next to test the setup.
- Microsoft will send a notification to your phone — approve the request.
Step 7: Done!
You'll now see Microsoft Authenticator listed as a sign-in method.
You can make it your default method by clicking Change next to “Default sign-in method” and selecting “Microsoft Authenticator - notification.”