Subnet definitions are authoritative

This setting does not apply to desktop apps.Turns off Windows Network Isolation's automatic discovery of private network hosts in the domain corporate environment.If you enable this policy setting it turns off Windows Network Isolation's automatic discovery of private network hosts in the domain corporate environment. Only network hosts within the address ranges configured via Group Policy will be classified as private.If you disable or do not configure this policy setting Windows Network Isolation attempts to automatically discover your private network hosts in the domain corporate environment. For more information see: http://go.microsoft.com/fwlink/p/?LinkId=234043

Policy path: 

Network\Network Isolation

Scope: 

Machine

Supported on: 

At least Windows Server 2012 Windows 8 or Windows RT

Registry settings: 

HKLM\SOFTWARE\Policies\Microsoft\Windows\NetworkIsolation!DSubnetsAuthoritive

Filename: 

NetworkIsolation.admx