With an automated desktop pool that contains full-clone virtual machines, you create a virtual machine template and Horizon 8 uses that template to create virtual machine desktops.
Depending on how you want the golden image to be managed, you can change the golden image and snapshot source in your pool from vCenter to Image Catalog or reverse. You must rebuild the virtual machine associated with the edited template source for the change to take effect. For more information on the Image Management Service, see the Managing Horizon Images from the Cloud document.