This policy setting limits a node to resolving, but not publishing, names in a specific Peer Name Resolution Protocol (PNRP) cloud.
This policy setting forces computers to act as clients in peer-to-peer (P2P) scenarios. For example, a client computer can detect other computers to initiate chat sessions, but other computers cannot detect that client and initiate sessions with it.
If you enable this policy setting, this computer cannot register PNRP names, and cannot help other computers perform PNRP lookups.
If you disable or do not configure this policy setting, this computer can publish PNRP names and help other computers perform PNRP lookups.
At least Windows XP Professional with SP2
Not Configured - No registry values are specified.
Disabled - Any values that would be created by the policy in the registry are deleted.
Enabled - Adding, modifying or delete values in the registry.
User Interface can be found in the Group Policy.
Please navigate to Computer Configuration - Policies - Administrative Templates - Network - Microsoft Peer-to-Peer Networking Services -
Peer Name Resolution Protocol - Site-Local Clouds folder.