I am going to have to configure an ISA Server with an Exchange Server behind it, and users that connect to 2 cluster servers and then to 3 terminal servers. They all run Outlook 2000 for internal e-mail through the exchange server and the internet e-mail is handled outside of the company with an ISA. The O/S is Windows 2000 Advanced server. Most of my users have thin clients and I have a few PC's. Will I have to load the firewall client on my terminal servers? cluster servers? Not sure how to go about this. I asked on the message board and Dr. Shinder replied that he had not really given this configuration much thought. Has anyone done this before with some success. Thanks Debbie