After you have enrolled for two-factor authentication, you will need to login using your Eamil address / Password and then use your device to verify your identity when you access to protected CAS services:

1. Enter your email address and password as usual

2. Duo chooses one of your configured login options automatically by selecting the most-secure available method. e.g., automatically send a Duo Push to your default mobile device.
   

3. Launch the Duo Mobile app with your smartphone
    
4. Tap to respond the request
   
    
5. Tap APPROVE to access the secured service
   
6. You are securely logged in.