The following URLs describe a new feature of Windows Certificate server is the ability to install multiple instances on the same server.
- (see end of "transcript" link it's a zip file) http://www.digitalsupporttech.com/mskb/896/896733_TechNet_Support_WebCast:_Best_Practices_for_Public_Key_Infrastructure:_Steps_to_build_an_offline_root_certification_authority_%28part_1_of_2%29.htm
Quote: "Multiple Certificate Server instances on a single physical server"
Quote: "Multiple instances of the Certificate Enrollment Web Service can be installed on a single computer in order to support multiple CAs."
Question How can I actually implement multiple CA instances on a Windows 2008R2 server?