Last Friday we announced that an updated CTP for System Center 2012 SP1 is now available for download.  You will need to grab this in order to manage your Windows Server 2012 RC installations (I am installing it in my test lab right now).

You can read more about it here: http://blogs.technet.com/b/server-cloud/archive/2012/06/15/system-center-2012-sp1-ctp2-now-available.aspx

Cheers,
Ben