Faculty, staff and students are automatically enrolled in Duo two-factor authentication. You will be prompted to enroll in Duo when trying to log in to campus systems ...

Duo is William & Mary's two-factor authentication service. It provides an additional level of security to prevent unauthorized access to a variety of systems. Two-factor authentication helps protect ...

If you want to call someone who isn't a Duo user, Duo knows that and offers to send a text message inviting them to install the app. The app has a number of other convenient features as well.