Microsoft’s VDI solution offers two deployment scenarios: virtual desktop pools and personal virtual desktops. Virtual desktop pools aren’t dependent on a specific Active Directory schema level; however, personal virtual desktops do need a Windows Server 2008 or Windows Server 2008 R2 schema. Here’re AD requirements for personal virtual desktops: To deploy personal virtual desktops, your schema for AD forest must be at least Server 2008. To use added functionality provided by Personal Virtual Desktop tab in User Account Properties dialog box in AD Users and Computers, you must run AD Users and Computers from a computer running R2 or from Windows 7 that has Remote Server Administration Tools (RSAT) installed; You must use a domain functional level of at least Windows 2000 Server native mode. The functional levels Windows 2000 Server mixed mode and Windows Server 2003 interim mode aren’t supported.