If you want to change to another
method, please follow the steps below:
- Open a browser on your computer and sign in to www.office.com 
 - Once logged in, click your profile icon on upper right.
     Then choose "My Account". 
 
- From the left panel, choose "Security info".
     And click "Change" for the "Default sign-in
     method" on the right. 
 
- From the "Which method would you like to use to
     sign in?" option, choose the verification method you
     want. 
 
- Then click "Confirm". 
 
- A message will be shown to confirm your changes.