This document discusses enterprise desktop virtualization solutions using Microsoft and Citrix technologies. It provides an overview of Citrix and Microsoft virtualization platforms and licensing models. It also summarizes the key components of delivering and managing virtual desktop infrastructure (VDI), including XenDesktop and XenApp for desktop and application delivery, Microsoft VDI suites for licensing, and System Center for management. Finally, it briefly discusses supported end user devices for connecting to virtual desktops and applications.