Setting-up Authenticator Using your Phone
Start by downloading the Microsoft Authenticator app to your phone and opening it.
Click on the "+" button at the top of the app and select "Work or school account".
From the pop up page, select your account and sign in using your campus credentials.
Setting-up Authenticator Through the Internet
Start by Downloading Microsoft Authenticator to your phone.
Go to your preferred browser and go to https://mysignins.microsoft.com/security-info and sign in.
Click on "Add sign-in method" and choose Microsoft Authenticator.
It will prompt you through a download and set up of the Authenticator app and will then generate a QR code.
Open the app on your phone and select the blue circle button in the bottom right hand side to open the QR scanner.
Scan the QR code with your phone to link your account.