I recently followed directions here for configuring our Exchange server to allow a second email address domain for selected users. I created a new Recipient Policy for the new @domain, then added second email address for a few users (including myself) through our AD email address properties. Then I setup my Outlook for the new email address, which had to be a POP account as I already had an Exchange account. I'm pretty sure I setup the POP account properly, but when I sent a test message and I clicked "Send/Receive", I got the test message ok, but at the same time all of the existing emails that were in my InBox were duplicated! So I deleted the duplicates, and clicked Send/Receive again, and again duplicate copies of all of my InBox emails arrived. I had another user setup their Outlook also, and they had exactly the same experience. We ended up having to delete these new accounts from our Outlooks.
Any idea why this happened? Is there a special way to setup a 2nd account in Outlook so it works properly?
BTW, we have Exchange 2003 running on Windows Server 2003, and Outlook 2003 clients.