Set up multi-factor authentication in Microsoft 365 Business

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Multi-factor authentication provides more security for your business. Follow these steps to set it up.

  1. When you sign in to https://office.com, you'll see the More information required prompt. Choose Next.

  2. Under Step 1, choose Mobile app from the Authentication phone drop-down list.

  3. Under How do you want to use the mobile app?, select the method you want to use to sign in:

    • Select Receive notifications for verification to authenticate directly from your mobile app, which may include fingerprint authentication.

    • Select Use verification code to enter a new verification code each time you authenticate.

  4. Choose Set up.

  5. Leave the Configure mobile app window open on your computer.

  6. On your mobile device, go to the app store, search for "Microsoft Authenticator," select it, install it, and open it.

  7. In Authenticator, follow the prompts to complete the wizard, and then choose the plus (+) sign to add your account.

  8. Choose Work or school account, choose Allow when prompted for permission to take pictures and record video, and then follow the instructions to scan the QR code in the open window on your computer.

  9. After the account has been added, choose Got It.

  10. On your computer, choose Next, and then choose Next again.

  11. Make a note of the code that appears on your mobile device, enter the code on your computer in the box under Step 2, and then choose Verify.

  12. In the boxes under Step 3, enter a backup phone number, such as your office number, choose Next, and then choose Done.

Multi-factor authentication provides more security for your business. Here's how you set it up.

When you sign in, you'll be prompted to provide more information. Select Next.

From the drop-down menu, choose Mobile app. Then choose how you want to sign in with your mobile app. Choose Receive notifications for verification to authenticate directly from your mobile app, which may include fingerprint authentication. Or choose User verification code if you would rather enter a new verification code each time you authenticate. Then, Set up.

Now you'll need an app on your phone to continue, but leave this window open on your computer.

On your phone, select your device's app store. Search for the Microsoft Authenticator app. Select it, install it, then open it. Complete the wizard, and select the plus (+) sign to add your account. Choose Work or school account, accept the required app permissions, then scan the QR code on your computer. Once the account has been added, select Got It, and then return to your computer.

Select Next, then Next again, and return to your phone. Make a note of the code.

On the computer, enter the code, then select Verify. Enter a backup phone number, like your office number. Select Next, then Done.

The next time you sign in, you'll be prompted to log in using your device.

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