The Exchange 2013 “Server Role Requirements Calculator” was released today. New to the 2013 version is support for both the client access and server roles, which are the only two roles in 2013. The general guidance is to deploy multi-role servers with 2013, so for most organizations this new support won’t really matter.
Also new is transport sizing (part of both roles, but mainly just affects the Mailbox role) and multiple DBs per JBOD volume. There are also many improvements for high availability support.
GREAT JOB Ross and team!!!
For full details see Ross Smith’s EHLO blog post here: http://blogs.technet.com/b/exchange/archive/2013/05/14/released-exchange-2013-server-role-requirements-calculator.aspx
For what’s New and Cool in Exchange 2013 see: https://blog.jasonsherry.net/2012/07/31/new_cool_exchange_2013/