http://blogs.technet.com/dustinj/archive/2007/07/30/required-connectivity-to-use-remote-web-workplace-port-4125-is-important.aspxThanks to John Joyner (Essentials TAP customer) for pointing out this great article that details connectivity requirements when using Remote Web Workplace - especially on a computer that's running the ISA firewall. ISA Server prevents connection to aenCommunityServer 2.1 SP1 (Build: 61025.2)