You should create an organizational unit (OU) specifically for your remote desktops. An OU is a subdivision in Active Directory that contains users, groups, computers, or other OUs.
To prevent group policy settings from being applied to other Windows servers or workstations in the same domain as your desktops, you can create a GPO for your Horizon 7 group policies and link it to the OU that contains your remote desktops. You can also delegate control of the OU to subordinate groups, such as server operators or individual users.
If you use View Composer, you should create a separate Active Directory container for linked-clone desktops that is based on the OU for your remote desktops. Administrators that have OU administrator privileges in Active Directory can provision linked-clone desktops without domain administrator privileges. If you change administrator credentials in Active Directory, you must also update the credential information in View Composer.