$dom = [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()
foreach ($dc in $dom.DomainControllers){
if (Test-Connection $dc -count 1 -Quiet){
dcdiag /s:$dc /f:C:\Users\<username>\Desktop\$dc.txt
}
else {
write-host “Server $dc is Offline” -BackgroundColor red
}
}