We’ve released an update to the E2010 Mailbox Server Role Requirements Calculator that addresses several usability issues identified in the v12.8 release. To see what’s new in this version and to download it, please go to Updates to the Exchange 2010 Mailbox Server Role Requirements Calculator!
Download it from here: http://gallery.technet.microsoft.com/v144-of-the-Exchange-2010-1912958d
Cheers,
Anderson Patricio
http://blogs.msexchange.org/patricio
Twitter: @apatricio