You can implement a unique OU for computer accounts that are created by the Horizon Cloud Service platform.

A large company with thousands of OUs and groups can easily have hundreds of thousands of objects in its AD. The company could save deployment time by implementing a unique OU for computer accounts that are created by the Horizon Cloud Service platform. The unique OU avoids the need for Horizon Cloud Service to parse the entire AD for virtual desktop and RDSH server computer objects.

See the Horizon Cloud setup web form for a list of users, accounts, and permissions needed.