One user wishes to send mail via Outlook 2003/Exchange 2003 as someone else (Send As in Outlook). This someone else is an alias in her AD profile (no real user account in our AD). When she attempts this, she gets the "You do not have the permission to send the message on behalf of the specified user". I've looked over other articles and see that it's necessary to grant that person Send As permission (for "This object only") and went as far as restarting the mail store on Exchange without any success. What haven't I done that's required?