http://blogs.technet.com/b/mike/archive/2011/04/08/lync-2010-stress-and-performance-tool.aspxHave you heard of Exchange Load Generator ? It’s a simulation tool to measure the impact of MAPI, OWA, IMAP, POP, and SMTP clients on Exchange servers. Basically, you can see if your planned Exchange infrastructure will stand up to the expected day-toen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)