I would strongly suggest you use the EUC access point appliance vs. the security server. Its a hardened Linux based appliance. The version in Horizon 7 is fairly easy to get setup. The version in 6.x is a little trickier. Here is an excellent blog covering how to do this. I was able to follow this (slowly) and get it all setup. I sleep much better at night knowing I have a locked down and hardened Linux based appliances in place of my previous Windows based security servers.
http://www.carlstalhood.com/vmware-access-point/
