Powershell wrapper for dnscmd operations. Detects NS resource records in reverse lookup zones and generates commands for automatic removal.

Bulk-AD-Reverse-DNS-NS-Delete

$ds = "dns.yourdomain.com"
$nd = "node.to.delete.yourdomain.com"

function Get-RevZones ($ds)
{
  $header = @("zonename","type","storage","prop","lookup")
	$raw = (dnscmd $ds /enumzones /reverse) | ?{$_ -match "Rev"} | %{$_ -replace "^."} | %{$_ -replace '\s+', ','}
	return ($raw | ConvertFrom-Csv -Header $header)
	
}

function Test-ZoneRecordNS ($ds, $zone, $node)
{
	$out = (dnscmd $ds /enumrecords $zone . /Type NS)
	
	if ($out -match $node)
	{
		return $True
	}
	else
	{
		return $False
	}	
}

$za = Get-RevZones $ds
$com = @()
foreach ($z in $za)
{
	if (Test-ZoneRecordNS $ds $z.zonename $nd)
	{
		Add-Member -InputObject $z -Name "nodeDetected" -Value [Boolean]"" -MemberType NoteProperty -Force
		$z.nodeDetected = $true
		$com += "dnscmd $ds /recorddelete $($z.zonename) @ NS $nd /f"
	}
	else
	{
		Add-Member -InputObject $z -Name "nodeDetected" -Value [Boolean]"" -MemberType NoteProperty -Force
		$z.nodeDetected = $false
	}
}