Lync Server Virtualisation Whitepaper
This document describes the supported functionality, environments, tools, limitations, and outlines a series of best practice recommendations for running Microsoft Lync 2010 in a virtualized environment.
Grab it from here: https://www.microsoft.com/downloads/en/details.aspx?FamilyID=f865e66d-1163-46ef-ba9c-d585376dfbae&displaylang=en