Login to VRops, Click on Administration>Licencing (under management) > edit the product licensing group.
Click next on the “select license keys tab”,
in the “add members” tab, scroll to the bottom and look for “objects always to exclude”
Expand “vCenter adapter”
Expand “host system” and select the host that you wish to exclude
Note: if you wish to deselect everything under the cluster (cascade) then Click on the down arrow next to “add” and select “selected objects and all its descendants”
Click next and finish to complete wizard