We are in the process of implementing an ISA server primarily to secure our Exchange traffic better than it is. We currently have our Exchange Server on our DMZ with entries in our Cisco PIX firewall to allow the inside network to see it and access it. We are being told that the only way to configure ISA for what we want would be to multi-home our ISA Server. Is that correct and if so, are there any security risks we are opening ourselves up to by having this configuration? I'm in an office that is becoming more and more paranoid regarding our security setup and they've been told over and over that multi-homing is bad...Any light you could shed would be great.