http://blogs.technet.com/b/mike/archive/2011/04/08/unified-communications-and-virtualization-can-i.aspxThe server virtualization whitepaper for Lync Server 2010 is available for download here . The whitepaper outlines supported functionality, hypervisors, virtualized deployment considerations, VM host and guest configurations, scale comparison, virtualizeden-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)