I have a W2K3 standard server that is running DHCP, DNS, and A.D. This server is in a domain that has another D.C. replicating the same information. DHCP reservations are used along side a firewall so that only computers that are grated access can go outside the network. Unfortunately we have to continue using DHCP reservations. When you delete a reservation that reservation comes back in about a 24 hour period. This is fairly recent, but since we don't delete reservations daily, I can't tell precisely when this started. Also there are no warning or errors being produced by any of the servers regarding DNS, FRS, or DHCP errors. If you have any insight, I would be extremely thankful!