Two Factor login Verification setup

[pemckee]

I would like to set-up Two Factor Verification for login to Comcast email. I went to setting and entered my cell number and my Comcast email address.  I only have a Comcast email address.  I keep receiving the error message: "That email address is already in use on another account." Is it possible for Comcast to assist in re-setting? How do I setup Two Factor Verification?

[ComcastCSAEmail]

The requirement is to set up a non-Comcast email for a recovery option. This is to prevent account lock-out. If you for instance change your phone number, you can request the code to be sent to an email that is NOT the comcast.net account you can't get into.