Servermanager from win 7 client cannot perform meta-data cleanup of a DC

I used to do meta data cleanup of dead DCs via ntdsutil, but read the newer ADUC has this integrated into it.

The problem is that I can only do it while consoled into a dc. When I connect to a DC via servermanager and try to delete a DC it tells me "the specified module cannot be found".

If I console into a DC and try to do the same thing (delete a DC in ADUC) it works without issues.