Change how you get 2-step verification codes

  1. Sign in to Office 365 using your password and verification code.

  2. From the upper-right corner of the Office 365 window, select your account name and then select View account > Update contact preferences.

  3. From the My account page, choose Security & Privacy > Additional security verification.

  4. Choose Add or change your security verification settings > Update your phone numbers used for account security. This will display the following page:

    additional security verification page
  5. Choose how you want to get your verification code

  6. Follow the prompts on the page.