Multi-factor authentication is part of the new UW–Madison login process that verifies your identity. It combines something you know (your NetID and password) with something you have (smartphone, token/fob or tablet) preventing anyone but you from logging into a system. UW-Madison has partnered with Duo to provide this service.
You will now need to log in by:
Entering your NetID and password, and
Confirming your login with the Duo app on your device.