Run a report to show computers in AD that are not managed by Desktop Central

Run a report to show computers in AD that are not managed by Desktop Central

I am looking for a way to report on computers that are in our AD but that have not been added to Desktop Central.
I can see these when going to "Add Computers" under SOM and showing Hide Managed Computers, but I would like to run a report on these.
              New to ADManager Plus?

                New to ADSelfService Plus?