Once your account has been enabled to use multi-factor authentication for Office 365, the easiest verification method to use is Microsoft Authenticator app as a security token. It's just one click instead of typing in a 6-digit code. And if you travel, you won't incur roaming fees when you use it.

If you want to change to other method, please follow the steps below:

  1. Open a browser on your computer and sign in to GTIIT webmail - http://mail.gtiit.edu.cn/
  2. Sign in to Office 365 with your GTIIT email address as username and your password like you normally do.
  3. Once logged in, click your profile icon on upper right. Then choose "View Account".
  4. From the left panel, choose "Security info". And click "Change" for the "Default sign-in method" on the right.
  5. From the "Which method would you like to use to sign in?" option, choose the verification method you want.
    verification option
  6. Then click "Confirm".
    Choose to confirm the change
  7. A message will be shown to confirm your changes.
    confirmation message