List all users or computers in the default domain in PowerShell

List all users or computers in the default domain in PowerShell

Sniff. My first PowerShell script. It's like being a new dad all over again.

Save the script with a .ps1 extension and run it via the Powershell command. The script accepts either the parameter USERS or COMPUTERS

$de = New-Object directoryservices.directoryentry('LDAP://rootDSE')
$Root = New-Object directoryservices.directoryentry("LDAP://$($de.DefaultNamingContext)")
$searcher = new-object System.DirectoryServices.DirectorySearcher($root)

switch ($args[0]) {
"computers" {$searcher.Filter="(&(objectCategory=computer))"}
"users" {$searcher.Filter="(&(objectCategory=person)(objectClass=user))"}
default {"Please specify either USERS or COMPUTERS.";Exit}
}

$searcher.PageSize = 1500
$searcher.PropertiesToLoad.Add("cn")
$searcher.sort.PropertyName="cn"
$ADItems = $searcher.findAll()
foreach ($user in $AdItems){$user.properties.cn}