Microsoft System Center Virtual Machine Manager (SCVMM), released in beta end of April, has been updated to enable it to function with Release Candidate 1 (RC1) to the Hyper-V role. Note that the VMM server and all of the hosts in your environment must be running Hyper-V RC1. After you install the update, you will not be able to add hosts running Hyper-V RC0 to your VMM environment.
[Source: Windows Virtualization Team blog]