This setting does not apply to desktop apps.A semicolon-separated list of intranet proxy server IP addresses. These addresses are categorized as private by Windows Network Isolation and are accessible to apps that have the Home/Work Networking capability.If you enable this policy setting it allows an administrator to configure a set of proxies that provide access to intranet resources.If you disable or do not configure this policy setting Windows Network Isolation attempts to discover proxies and configures them as Internet nodes. This setting should NOT be used to configure Internet proxies.Example: [3efe:3022::1000]; 18.0.0.1; 18.0.0.2For more information see: http://go.microsoft.com/fwlink/p/?LinkId=234043
Network\Network Isolation
Machine
At least Windows Server 2012 Windows 8 or Windows RT
HKLM\SOFTWARE\Policies\Microsoft\Windows\NetworkIsolation!DomainLocalProxies
NetworkIsolation.admx