Resolves a DNS record on all active DCs in a domain

Resolve-DnsRecordAllDCs.ps1

function Resolve-DnsRecordAllDCs {
    <# .SYNOPSIS
    Resolves a DNS record on all active DCs in a domain #>
    [Alias('nslookup_all')]
    Param(
        # Name to resolve
        [Parameter(Mandatory, ValueFromPipeline)]
        [string]$Name,
        # Type of record
        [Parameter(ValueFromPipelineByPropertyName)]
        [string]$Type = 'A',
        # Batch size for parallel query
        [Parameter()]
        [int]$ThrottleLimit = 10
    )

    Resolve-DnsName -Type 'SRV' -Name _ldap._tcp.dc._msdcs.$env:USERDNSDOMAIN |
        Where-Object { $_.Type -eq 'SRV' } | ForEach-Object -ThrottleLimit $ThrottleLimit -Parallel {
            if (Test-Connection -TargetName $_.NameTarget -Count 1 -TimeoutSeconds 1 -Quiet) {
                Resolve-DnsName -Type $Using:Type -Name $Using:Name -Server $_.NameTarget `
                    -DnsOnly -QuickTimeout -ErrorAction SilentlyContinue
            }
        } | Where-Object { $_.QueryType -eq $Type } # | Select-Object -Unique
}

Updated version available in my HelperFunctions module.