Microsoft Authenticator is a security feature that helps you keep your personal information safe. You can use it to sign in to your computer, access your account information, and more. If you lose or forget your Microsoft Authenticator device, you can easily reset it. Here are some tips on how to change your Microsoft Authenticator device:

  1. Log in to your computer using the Microsoft account that you use to log in to Windows 10 or Windows 8.1.
  2. In the Accounts area of the Windows 10 or Windows 8.1 desktop, click on the three lines in the top left corner of the screen and select Change Account Type .
  3. In the Change Account Type dialog box, select Microsoft Authenticator from the list of options .
  4. Click on OK to finish changing your Microsoft Authenticator device type.