Retrieves the DNS Servers from all IPEnabled Network Adapters.

Get-DNSConfiguration.ps1

<#
.SYNOPSIS
    Retrives DNS Servers from a computer.
.DESCRIPTION
    Retrives primary, secondary, tertiery DNS Servers from on online system with Windows Management Instrimentation.
.INPUTS
    System.String.
.OUPUTS
    System.Management.Automation.PSObject.
.PARAMETER ComputerName
    The computer to retrieve information from.
.PARAMETER Credential
    PSCredential object with rights to the re
.EXAMPLE
    PS C:\> Get-DNSConfiguration
.EXAMPLE
    PS C:\> Get-DNSConfiguration -ComputerName 'remotepc.my.org' -Credential (Get-Credential)
.NOTES
    Remote access to WMI is required.
.LINK
    http://dotps1.github.io
#>
Function Get-DNSConfiguration
{
    [CmdletBinding()]
    [OutputType([PSObject])]

    Param
    (
        [Parameter(ValueFromPipeLine = $true)]
        [String]
        $ComputerName = $env:COMPUTERNAME,

        [Parameter()]
        [PSCredential]
        $Credential
    )

    Begin { }

    Process 
    { 
        try
        {
            $gwmiParams = @{
                ComputerName = $ComputerName
                Class = 'Win32_NetworkAdapterConfiguration'
                Namespace = 'root\cimV2'
                Filter = "IPEnabled='TRUE'"
                ErrorAction = 'Stop'
            }

            if ($ComputerName -ne $env:COMPUTERNAME -and $Credential -ne $null)
            {
                $gwmiParams.Add('Credential', $Credential)
            }

            $networkAdapters = Get-WmiObject @gwmiParams
        }
        catch
        {
            Write-Error -Message $_.ToString()
            break
        }

        foreach ($networkAdapater in $networkAdapters)
        {
            $dnsServers = $networkAdapater.DNSServerSearchOrder

            return [PSObject]@{
                PSComputerName = $ComputerName
                PrimaryDNSServer = $dnsServers[0]
                SecondaryDNSSserver = $dnsServers[1]
                TertieryDNSServer = $dnsServers[2]
                NetworkAdapter = $networkAdapater.Description
            }
        }
    }

    End { }
}