Creating Fence Environments using Team Foundation Server 2013 Preview Lab Management can put Lab Environment in “Not Ready” state

This post addresses a specific issue where creating fence environments using Team Foundation Server 2013 Preview Lab Management can result in the Lab Environment being in a "Not Ready" state. The cause is identified as the test agent firewall exception for TCP port 6910 not being correctly applied to the public profile when the guest OS is Windows 2012 R2 Preview. A workaround is provided: installing agents for the Lab Environment once. This post also references a known bug in Lab Management 2013 Preview.