My problem began when I used ghost to image from the small hard disk to bigger hard disk. There are no problems for all users before imaged both AD (server 2003) and Exchange 2003. However, the problems happen only in exchange server to all new user / re-enable users after ghosted. For the new user, he/she can login on workstation ok but everytimes when I try to login to his/her email via outlook, I will get an error message "The name could not be match to a name in the address list". Also new user can not login to exchange via web outlook either. For re-enable users, he/she will able to login to his/her email only via outlook in the office but he/she will not able to email login via web outlook anywhere even in the office.