You can probably leave that in place (given proper IP changes and such), but ideally, make the Exch server a secureNAT client and server-publish it. The ISA help and tutorials on isaserver.org can guide you through. Jim Harrison MCP(2K), A+, Network+, PCG ----- Original Message ----- From: "Donald Coleman" <dcoleman@xxxxxxxxxx> To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx> Sent: Tuesday, September 25, 2001 7:17 PM Subject: [isalist] Exchange Server 5.5 behind ISA server?????? http://www.ISAserver.org We now have Exchange server 5.5 behind our Microsoft Proxy Server. We intend to upgrade to ISA Server but I have no idea how to configure Exchange. In the case of MSP 2.0, I made several wspcfg.ini files with appropriate changes so that SMTP/POP3 would work. What do I do in the case of ISA?? ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jim@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')