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I am helping with a migration from Exchange 2003 to Exchange 2010 and tasked with setting up an ISA 2006 Enterprise server in a separate DMZ single leg configuration for the Exchange 2010 CAS servers. Does the server have to be a member of the domain? Can an expert send me a few pointers and a straight forward intruction?
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I am helping with a migration from Exchange 2003 to Exchange 2010 and tasked with setting up an ISA 2006 Enterprise server in a separate DMZ single leg configuration for the Exchange 2010 CAS servers. Does the server have to be a member of the domain? Can an expert send me a few pointers and a straight forward intruction?

ISA 2006 Setup for Exchange 2010.

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.