I have a user who needs to manage 2 exchange 2003 mail boxes from a single instance of outlook 2003. They can receive messages in this second mailbox, but can't reply to them using the user of the 2nd mailbox, getting a reply stating they don't have permission to send.
I gave the primary account full permissions under the mailbox rights of the secondary account (at least I think I did, I checked off all the boxes under Mailbox rights, including ownership).
I can see the secondary account as well as all the emails that are received in the secondary users mailbox in the lower portion of the navigation tree on the left. But if we try and reply to an email in this secondary mailbox as the secondary user, it bounces back as an undeliverable stating:
You do not have permission to send to this recipient. For assistance, contact your system administrator.
What other rights must I give the primary user so that they can reply with the identity of the secondary user?