Get all of the conditional forwarders setup in an Active Directory domain
Just a quick post here as I found myself needing to find out what conditional forwarders each domain controller in an Active Directory domain had configured. We have nearly a hundred domain controllers and so going manually one-by-one was simply not an option.
I whipped up this PowerShell script and figured that someone else out there might need something similar. It is parallelized (the number of $instances can be changed to do more/less parallel work) and then just dumps it to a CSV-ish file.
$instances = 10
Get-AdDomainController -Filter * | ForEach-Object -ThrottleLimit $instances -Parallel {
$dc = $_
Write-Host $dc.Name
$zones = Get-DnsServerZone -ComputerName $dc.Name | Where-Object {$_.ZoneType -eq "Forwarder" }
$string = $dc.Name + ","
ForEach ($zone in $zones) {
$string = $string + $zone.ZoneName + ","
}
Write-Host $string
$string | Out-File -FilePath ".\zones.txt" -Append
}There’s a lot of room for improvement here obviously, but it should at least get you going.