In Horizon Console, you can remove unmanaged machines and remove registered machines from Horizon 7.
Unmanaged machines include physical computers, RDS hosts, and virtual machines that are not managed by vCenter Server. These unmanaged machines must therefore be registered with the Connection Server instance before they can be added to a desktop pool.
There are two types of registered machines in Horizon 7: RDS Hosts and Others. Unmanaged machines are in the Others category. Use unmanaged machines to form desktop pools that do not contain vCenter Server virtual machines.
When you reconfigure a setting that affects an unmanaged machine, it can take up to 10 minutes for the new setting to take effect. For example, if you change the Automatically logoff after disconnect setting for a pool, Horizon 7 might take up to 10 minutes to reconfigure the affected unmanaged machines.