Command line, my friend.
10.8 is easier to support if you're using it inside Apple's box.
But if you're doing stuff that suddenly they don't support through the GUI, then you'll have to talk to an "Apple Genius," or a person that knows how to configure the service in question through the command line.
There's another post here from a guy who says he wants to enable Authenticated Directory Binding, but that checkbox is no longer anywhere to be found in any app.
You can still do it, but you just have to know where to look.
What service are you trying to modify and can't? Perhaps someone here can help?