My son created an xbox live account with his mom's e-mail. Then he got an e-mail account of his own. He created another gamertag with that account, but has never used it. Now my daughter is old enough to have her own gamertag, but can't use Mom's e-mail because we can't switch her brother's to the e-mail he always uses. How do we do this? I won't create an e-mail account for my daughter. Easiest way to do this should be to delete the gamertag associated with the son's e-mail, and then switch his xbox live account to HIS e-mail.