I have created a mailbox in Exchange 2007 I have used the command Add-MailboxPermissionand given full access to another user.They cannot forward emails from that account to either anyone in the domain or outside. They are getting a permission error!Has anyone got any ideas on how to resolve this as I would of thought if they had full permission to that mailbox then this would allow this to happenThanks

Set-MailboxuserB -GrantSendOnBehalfTo userA

I think there is a little walk though here http://msexchangeteam.com/archive/2006/09/05/428833.aspx

Thanks b.u.t.l.e.r for your help