ÿþ$ErrorActionPreference = "SilentlyContinue"
$servers = gc "s:\Scripts\servers.txt" #update this path
$outfile = "s:\DNS_Update_Logs.txt" #update this path
foreach ($server in $servers){
	$server = $server.trim()
	if (Test-Connection -ComputerName $server -Quiet -Count 2){
		$NICs = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $server -ErrorAction SilentlyContinue -WarningAction SilentlyContinue -ErrorVariable WMIError |where{$_.DHCPEnabled -ne "True" -and $_.IPEnabled -eq "True"}
		if(!$?) {
			$result = $server+" - WMI Error or dont have access, check following error
$WMIerror"
			$result | Out-File $outfile -Append -Confirm:$false
			Write-Host $server" - Could not connect to server check log file for more details" -ForegroundColor Red
		}
		else {
			if ($NICs){
				Foreach($NIC in $NICs) {
					$DNSServers = "198.168.2.100","198.168.2.101"
					$configureDNS = $NIC.SetDNSServerSearchOrder($DNSServers)
					if ($configureDNS.ReturnValue -eq "0"){
						$result = $server+" - DNS Updated"
						Write-Host $result -ForegroundColor Green
						$result | Out-File $outfile -Append -Confirm:$false
					}
					else {
						$result = $server+" - DNS Update Failed"
						Write-Host $result -ForegroundColor DarkRed
						$result | Out-File $outfile -Append -Confirm:$false
					}
				}
			}
			else {
				$result = $server+" - DHCPEnabled or no IP Address enabled"
				Write-Host $result -ForegroundColor DarkRed
				$result | Out-File $outfile -Append -Confirm:$false
			}
		}
	}
	else {
		$result = $server+" - Not Reachable"
		Write-Host $result -ForegroundColor DarkRed
		$result | Out-File $outfile -Append -Confirm:$false
	}
}
$ErrorActionPreference = "Continue"