In Horizon Administrator, you can add and remove unmanaged machines from manual desktop pools and remove registered machines from Horizon 7. Unmanaged machines include physical computers and virtual machines that are not managed by vCenter Server.
For information about deleting a desktop pool that contains unmanaged machines, see Delete a Desktop Pool.
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 Message security mode in Global Settings or change the Automatically logoff after disconnect setting for a pool, Horizon 7 might take up to 10 minutes to reconfigure the affected unmanaged machines.