diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/directorytree/ldaprecord/src/Models/OpenLDAP/OrganizationalUnit.php b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/directorytree/ldaprecord/src/Models/OpenLDAP/OrganizationalUnit.php
new file mode 100644
index 0000000..7ae0a37
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/vendor/directorytree/ldaprecord/src/Models/OpenLDAP/OrganizationalUnit.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace LdapRecord\Models\OpenLDAP;
+
+class OrganizationalUnit extends Entry
+{
+    /**
+     * The object classes of the LDAP model.
+     *
+     * @var array
+     */
+    public static $objectClasses = [
+        'top',
+        'organizationalunit',
+    ];
+
+    /**
+     * Get the creatable RDN attribute name.
+     *
+     * @return string
+     */
+    public function getCreatableRdnAttribute()
+    {
+        return 'ou';
+    }
+}