> $dcs = (Get-ADDomainController-Filter *).Name
> foreach ($dc in $dcs) {
    Add-DnsServerQueryResolutionPolicy -Name "Client Subnet DE" -ClientSubnet "EQ,DE-Prod" -ZoneName "contoso.com" -ZoneScope "DE,1" -Action ALLOW -ComputerName $dc
    Add-DnsServerQueryResolutionPolicy -Name "Client Subnet CA" -ClientSubnet "EQ,CA-Prod" -ZoneName "contoso.com" -ZoneScope "CA,1" -Action ALLOW -ComputerName $dc
    Add-DnsServerQueryResolutionPolicy -Name "Client Subnet JP" -ClientSubnet "EQ,JP-Prod" -ZoneName "contoso.com" -ZoneScope "JP,1" -Action ALLOW -ComputerName $dc
  }