Ok, I'm a little new to Exchange. I have EX2003 with Outlook clients. We are a very small company with only 4 employees. I dont understand the way Exchange "assigns" email addresses. For example: I have a user named John Smith. I created his AD user account and enabled mail for him. his email address was "firstname.lastname@example.org". The problem is that up until now, we've been using POP email and we'd given John the email address "email@example.com". So, I go into ADUC and "add" the "accountspayable@" email address for him. I select "Set as Primary" for that address. But after about two minutes, it reverts back to "firstname.lastname@example.org"! I realize that this probably has something to do with the "automatically update e mail addresses based on recipient policy" check box. Help!