"Set Server Backup" isn't for setting up client backups to the server (that share exists and is set up when client machines install the Connector software); it's for setting up the server's backups, and it needs a separate disk from the system/share volumes to back up to. That's what the shares back up to. Since you're running Hyper-V, you'll have to offline a physical disk/volume and "pass it thru" to the VM for virtual WHS to see it.
WSE 2012 R2.
Dashboard constantly reports The Network Firewall is turned off for one client PC.
I check that PC and the firewall is turned on.
Why? How to get rid of this? I delete it comes back, so I just set it to ignore. Very annoying.