http://blogs.technet.com/tristank/archive/2009/04/15/on-the-isa-server-security-update.aspxRambling my way to a point One of my most favourite “Favorites” (read: “he snarled”) in recent weeks has been the ISA Server Product Team’s Build Numbers post . They helpfully list the version numbers of each ISA Server, um, version, along with a linken-AUCommunityServer 2.1 SP1 (Build: 61025.2)