A. Yes, Windows Server 2008 R2 SP1 Hyper-V will allow memory to by dynamically added and reclaimed from guest OSs. Once the NDA lifts, I'll post a detailed explanation of how it works—it's going to be great.
Whether you’re on Windows Server 2003 and eyeing the impending end of support, or your Active Directory is running a newer version of Windows Server, there is a ton of new functionality available as you migrate to Windows Server 2012 R2. Join Brian Desmond for 3 technical sessions that will walk you through all the new Active Directory features in Windows Server 2012 and Windows Server 2012 R2.