Add-DnsClientNrptRule -Namespace "webmail.domain.local" -NameServers "172.21.0.2","172.21.0.3" Get-DnsClientNrptRule | Where-Object { $_.Namespace -eq "webmail.domain.local" } | Remove-DnsClientNrptRule -Force Resolve-DnsName webmail.domain.local -Server 8.8.8.8