Domain network discovery has been turned off.
Solution: export mine that is on...
- run cmd as administrator, type netsh, then type advfirewall
- type export c:\firewall.wfw
copy the firewall.wfw file to client's computer.
import it:
netsh, advfirewall, import c:\firewall.wfw
Source: https://social.technet.microsoft.com/Forums/windows/en-US/af01c0c7-27aa-4540-a474-cd25d99256bc/remotely-enabling-network-discovery-in-a-domain-environment?forum=itprovistanetworking