Windows Server 2012 RTM and Exchange
Windows Server 2012 has RTM’d and yes Exchange 2013 Preview is supported on this platform. However, Exchange 2010 SP2 is NOT supported on Windows Server 2012 yet.
Also see: http://blogs.technet.com/b/exchange/archive/2012/09/14/windows-server-2012-and-exchange.aspx
Until later
Henrik