Log into your Office 365 Account: Go to office.com and sign in with your credentials.
Access Your Account Settings: Click on your avatar in the top right corner and select View account.
Navigate to Security Info: Under the Security info section, choose Update info. This will take you to the page where you can manage your authentication methods.
Edit Your Authentication Method: From here, you can add, remove, or change your phone number, email, or app used for authentication. You’ll see options to set up multi-factor authentication (MFA) if it’s not already configured1.
Save Your Changes: Once you’ve updated the desired information, make sure to click Save to apply the changes.
