I've got some problems with Exchange 2003 for AD. Currently, what's happening is I have a user who when then send on behalf of for a group mailbox, it lists as being sent from the mailbox and does not include "Sent on behalf of" in the name when sending. He was part of the "Send on behalf of" group, which I removed him from and he can still send email. I've checked every setting, with no sign of what the problem could be. I hope that makes sense. Does anyone know where else I can check to see how he's sending the emails from.