Microsoft System Center Virtual Machine Manager 2008 R2 SP1

Later "today" you can download VMM 2008 R2 SP1.

SP1 adds support for for Dynamic Memory and RemoteFX on Hyper-V

https://technet.microsoft.com/en-US/evalcenter/cc793138.aspx

More info on this link:

https://www.microsoft.com/systemcenter/en/us/virtual-machine-manager.aspx

 Now you can get the Service Pack 1 on Technet https://technet.microsoft.com/en-us/subscriptions/securedownloads/default.aspx

If you have SCVMM running the you can upgrade to SP1 with Windows Update