The most obvious requirement to install XenApp 6 is the operating system. XenApp6 is only available for Microsoft Windows Server 2008 R2, with two exceptions: Web Server and Core editions. We cannot install XenApp in these two versions.
If we want to deploy XenApp on Microsoft Windows Server 2003 or Microsoft Windows Server 2008 R1 (x86 and x64), we must choose to use XenApp 5. Citrix XenApp 6 does not support mixed farms. Mixed farms are XenApp farms that contain more than one server version.
Until previous versions, Citrix supported XenApp farms that contained different versions of Windows and/or of XenApp. XenApp 6 cannot coexist with any previous versions in the same farm. We can have two separated farms and use web interface ...