I have a client on Exchange 2003 using Outlook 2007. They have many additional mailboxes. The main account for the user account (A) wants to send an email from additional mailbox called (B). When the email is sent, the email goes into the sent folder of (A) instead of (B). Hope that is explained well.
There is previous forums with guides similar and I have tried the Registry fix KB Article 970944
LIAM PERRYMAN.