Last week I deployed with Update Manager some patches at an existing vSphere 6.0 environment, during the remediate process I received this error message:
The operation is not supported on the selected inventory objects. Check the events
for the objects selected for the operation.
During the Remediate process you need to disable Admission Control, also when you have enough resources available in the cluster. You can do this for this specific host you selected for remediate or you can you this temporary at cluster level