You can configure policies to control the behavior of desktop and application pools, machines, and users. You use Horizon Administrator to set policies for client sessions. You can use Active Directory group policy settings to control the behavior of Horizon Agent, Horizon Client for Windows, and features that affect single-user machines, RDS hosts, PCoIP, or VMware Blast.
For information on applying GPOs to instant clones, see "Instant-Clone Desktop Pools" in Windows Desktops and Applications in Horizon.