How do I propagate a primary smtp email address change in Exchange 2003. I have two email domains that point to the Exchange server. Domain1.com and Domain2.com. I had one user using the incorrect email domain as the primary domain address. When I changed the primary address to the correct domain, i still show emails from that user's sending address using the wrong primary address. For example i had email@example.com as the primary address. When she sends email it shows the sender as firstname.lastname@example.org. I then changed the user's primary address to email@example.com. When she sends an email, i still see the sender as firstname.lastname@example.org. Shouldn't this change to email@example.com.