I noticed that after setting up HyperV Server 2012 R2, that after applying needed firewall rules to allow remote management, that these were added into the "Public" profile. So, I disabled them and enabled for Private and proceeded to change the NIC which is internal to the LAN to Private as well.
All was good; however, after several hours... the network category reverted to Public on that NIC, which of course will not allow any remote management.
The firewall rules for remote management are only enabled for "Private".
I used: Set-NetConnectionProfile -InterfaceIndex # -NetworkCategory Private
Which works; however, what is causing it to revert to public after a given amount of time...