Systems running Horizon Agent must meet certain hardware and software requirements. What to read next Requirements and Considerations for Horizon Agent - Install and UpgradeThe Horizon Agent component assists with session management, single sign-on, device redirection, and other features. You must install Horizon Agent on all virtual machines, physical systems, and RDS hosts. Remote Display Protocol and Software Support - Install OnlyRemote display protocols and software provide access to remote desktops and applications. The remote display protocol used depends on the type of client device, whether you are connecting to a remote desktop or a remote application, and how the administrator configures the desktop or application pool.