Texas A&M University-Corpus Christi has standardized e-mail addresses across the campus. Your campus e-mail account takes the form Firstname.Lastname@tamucc.edu. You are not allowed to put any other e-mail address on your business cards.
Exchange.Admin@tamucc.edu saying your Outlook password will expire soon, or you just want to use a different password
If you want your campus e-mail forwarded to your username@lighthouse.tamucc.edu account you need to Setup Fetchmail.
If you already setup your campus e-mail to be forwarded to your username@lighthouse.tamucc.edu account and your password changes, you need to Update Fetchmail.