change network to private windows 2012 windows server

  1. Hit Winkey + R to open Run prompt and type gpedit.msc
  2. Navigate to: Computer Configuration/Windows Settings/Security Setting /Network List Manager Policies.
  3. Choose your Network name in the right pane.
    Note: To show networks not currently connected, right-click Network List Manager Policies in the left pane and choose Show All Networks.
  4. Go to Network Location tab and change the Location type from Public to Private. enter image description here
  5. Close Local Policy Editor.

Source: https://social.technet.microsoft.com/Forums/lync/en-US/82ccc68c-947e-435a-a237-1090f38d0dbe/windows-server-2012-r2-datacenter-network-stuck-in-public-mode