This whitepaper has been authored by experts at Liquidware to provide guidance to adopters of desktop virtualization technologies. It provides an overview of FlexApp concepts and ways in which FlexApp can serve as a cornerstone in an application delivery strategy. FlexApp Application Layering is an integrated part of ProfileUnity that enables applications to be virtualized innately so they look native to the Windows operating system (OS) and other applications. FlexApp is a perfect complement to ProfileUnity, which provides full user- environment management (UEM) with advanced features such as Application Rights Management and context-aware settings for printer and policy management. Although FlexApp is cost effectively licensed with ProfileUnity, the solution can be licensed separately if your organization has already standardized on an alternative UEM solution. Application layering leads to much higher rates of compatibility than earlier technologies, which used application isolation to virtualize applications. Once applications have been packaged for layering, they are containerized on virtual hard disks (VHDs) or virtual machine disk files (VMDKs) and can be centrally assigned to users on a machine-level or context-aware basis. FlexApp DIA (department installed applications) are compatible with virtual, physical, and Server Based Computing (SBC) environments such as Citrix XenApp and RDSH. Select users in specialized virtual desktop infrastructure (VDI) environments can also be empowered to install their own applications through a similar feature in ProfileUnity known as FlexApp user-installed applications (UIA). FlexApp DIA greatly reduces desktop administration overhead by dramatically reducing the need for traditional software distribution and a reduction in the number of base images needed to support users. FlexApp UIA was designed to make more users, including knowledge and task workers, compatible with VDI. Together, FlexApp UIA and DIA are powerful allies of VDI users and administrators.