I'm sure there is a simple answer to this problem.
I have a contact set-up in Active Directory firstname.lastname@example.org
Its put in the Sales OU
I would like everyone in the sales department have the permission to send on behalf of email@example.com
I can't find a tab with any obvious clues to exchange permissions.
When the sales users are sending on behalf of firstname.lastname@example.org they get a popup message saying "You do not have permission to send the message on behalf of the specified user."