I had modified an Exchange 2007 contact to a new external address. I then later modified it back to the old address. Now when anybody sends an e-mail to that contact, it goes to both. I have even tried deleting the contact and recreating it. Is there somewhere in Exchange that this phantom address could be? How does the contact keep getting tied back to the old address? I made sure each test was sent using the address list and not the cached entry on my Outlook.

Just a sanity check you're sure that at any given point the contact has only 1 email address? To verify try creating a second contact and give it the external address of the second email address and see if it complains about a duplicate.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Just tried your suggestion and it does not complain about a duplicate. The real contact only has the 1 e-mail address it is supposed to have.

So basically you now have 2 contacts with unique external smtp address and if you email each address they go to their respective recipients. Now if you remove the second contact are you saying that the first contact will start receiving the emails? Trying to see how to reproduce this, I've never experienced this.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com