A: Citrix XenDesktop serves a unique role in that it layers atop a data center's virtualization infrastructure and works in collaboration with the data center's application delivery infrastructure. As a result, the network delivery aspect of XenDesktop's virtual machines (VMs) requires that those VMs support some Citrix drivers in addition to some VMware drivers.

One such driver is the Windows Display Driver Model (WDDM), for which both VMware and Citrix drivers exist, but only Citrix's drivers work in a XenDesktop infrastructure. As a result, XenDesktop's Virtual Desktop Agent must be installed after the installation of the VMware Tools so that Citrix's WDDM driver replaces the equivalent driver from VMware.