My employer has around 700 two-node Hyper-V clusters located in remote sites across the country. They are currently running on Windows 2008 R2. We are planning to upgrade them to Windows 2012. Currently, we have one instance of DPM running on each Hyper-V cluster node backing up VMs and also the other Hyper-V cluster node (2 DPMs backup each other). This configuration is not supported by Microsoft but back then we’ve managed to get Microsoft to agree to take on the support. As we are planning for the Hyper-V upgrade to Windows Server 2012, and we will also be running a Windows Server 2012 VM, we can on longer use DPM 2010 to perform the backup.