Login to Webmail then follow these simple steps:
1 - Settings
2 - 2-Factor Authentication
3 - Fill all fields (make sure you click save to store your settings), take a snapshot/screenshot, and store it in a safe place.
4 - Scan the QR Code that appeared with one of these app recommendations.
5 - type the code after confirming in the field next to check code then press enter
6 - Log Out then log in to test and it is done