diff --git a/public/api/create_user.php b/public/api/create_user.php
index 5a83c59..9780627 100644
--- a/public/api/create_user.php
+++ b/public/api/create_user.php
@@ -33,6 +33,14 @@ if ($sam === '' || $pass === '') {
     exit;
 }
 
+if ($ou === '') {
+    $defaultOu = (string)($config['powershell']['default_ou'] ?? '');
+    if ($defaultOu !== '') {
+        $ou = $defaultOu;
+    }
+}
+
+
 // Build payload
 $payload = [
     'samaccountname' => $sam,