does someone faced error "The RPC server is unavailable" during connecting to Disk management MMC console to Hyper-V Server R2? Servers are in the same AD domain and MMC console is enabled on Hyper-V.
You need to change the Firewall rules on both machines (NOT only the Hyper-V Server)
Run this command on both machines:
netsh advfirewall firewall set rule group="Remote Volume Management" new enable=yes