http://blogs.msdn.com/b/lab_management/archive/2009/11/26/network-isolation-on-windows-server-2008-r2-hosts.aspxNetwork isolation does not work on Windows Server 2008 R2 hosts if you are using Beta2 version of Visual Studio Team Lab Management. When you create an environment with network isolation on a 2008 R2 host and start it, you will get the following erroren-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)