A customers exchange died without a good backup. I ripped the old one out of AD and Exchange System manager and set up a new server. Everything seemed to work ok. I changed the login names (just first name) to first initial and last name for an e-mail address. I can send to it fine, they can reply fine, but they can't send a new e-mail through outlook. They get the infamous "you do not have permission to send to this recipient through outlook". As a test I had them go to webmail and they can send fine through that. I know I am missing something small and dumb, but what? BTW they are using outlook 2007. I had them delete the old exchange account and connect to the new one. They also logged off and back on. They are using outlook 2007.