My brother-in-law lived with my wife and I for several years, and I created a Comcast email address for him on my account. He's bought a new home, has his own Comcast account, and would like to keep the email address that he's been using for years. Is there any way to move that email address from my account to his new account?
It can be done, but it's not a simple process. You will wind up calling Comcast, and you and your B I L will both have things to do. See here-------------
But in the meantime, there's no rush, since your B I L can just keep using the account anyway.