Microsoft Exchange 2013 Preview can be downloaded here (it takes about 1.5 GB).
To install Exchange 2013 Preview requires that the Active Directory is located at least one domain controller to Windows Server 2008 and requires that in each Active Directory Site was a Global Catalog.
Exchange 2013 Preview can be installed in an environment where the level of the forest is at least Windows 2003.
During the installation of Exchange server roles, it is recommended that you first install the CAS role (Client Access Server), and MBX (Mailbox Server).
The network environment must support IPv4, IPv6 is also supported but may not be such a situation, we installed the Exchange 2013 Preview in the environment that only supports IPv6, the installation fails. So far we are probably not in danger.
As previously mentioned on our Blog, Exchange 2013 Preview does not work with Exchange 2003!
The Exchange 2013 Preview can install either the Microsoft Windows 2008 R2 SP1 or on Windows Server 2012.