OS 10.5.8 server managing services for new laptops

We are running a xserve running 10.5.8 but we have newer laptops running 10.8.1, problem is the mobile accounts won't allow the things like Icloud to show up under the system prefs of the new macbooks, even though I have put some of the log ins as not managed. Any solutions to this where the teachers can possibly run the applications that are with the new laptops?