Has anyone ever successfully configured a MS Exchange Server 2003 on the DMZ to replicate to a Domain COntroller on the inside network through a Cisco Pix 515E Firewall? I get the Domain Controller to communicate with the Exchange server and see it across the firewall, but the Exchange server can not see the domain controller because of the current settings. I also have the successfully configured the exchange and domain controller to operate on the inside, but it will not replicate once implemented on the DMZ. Does anyone have any knowledge of the correct configuration required or can point me in the right direction. Gladly accepts, thanks in advance