How do I change my authentication method for Office 365 2-step verification?

  • Log in to
  • Click the your initials/profile picture at the top-right and select My account

  • Select Security & Privacy from the menu on the left
  • Choose Additional security verification

  • Click Update your phone numbers used for account security
  • Under the what's your preferred option heading, you can use the drop-down menu to select your default method

  • Under the how would you like to respond heading, you can tick any additional back-up methods you'd like to enable. You can use these back-up methods when your primary method isn't available e.g. a phone call to your personal extension if your mobile phone isn't available
Contact for this page:
Information Services, Aberystwyth University, Hugh Owen Library, Penglais, Aberystwyth, SY23 3DZ
Tel: 01970 62 2400 Email: