diff --git a/include/webdav_scan_diagnostic.inc.php b/include/webdav_scan_diagnostic.inc.php
new file mode 100644
index 0000000..b9aa2c3
--- /dev/null
+++ b/include/webdav_scan_diagnostic.inc.php
@@ -0,0 +1,79 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_run_webdav_scan_diagnostic()
+{
+  if (!function_exists('exec')) throw new RuntimeException('PHP exec() ist deaktiviert; der Scan-Test kann nicht gestartet werden.');
+  if (!function_exists('bratonien_tools_nc_connector_connections') || !function_exists('bratonien_tools_nc_connector_is_webdav'))
+  {
+    throw new RuntimeException('Connector-Verbindungen koennen nicht gelesen werden.');
+  }
+
+  $php = function_exists('bratonien_tools_webdav_warmup_php_cli') ? bratonien_tools_webdav_warmup_php_cli() : null;
+  if (!$php) throw new RuntimeException('PHP-CLI wurde fuer den Scan-Test nicht gefunden.');
+
+  $script = realpath(BRATONIEN_TOOLS_PATH.'runtime/lib/webdav-scan-diagnostic.php');
+  if (!$script || !is_file($script)) throw new RuntimeException('WebDAV-Scan-Diagnose wurde nicht gefunden.');
+
+  $reports = array();
+  $failed = false;
+  foreach (bratonien_tools_nc_connector_connections() as $connection)
+  {
+    if (empty($connection['enabled']) || !bratonien_tools_nc_connector_is_webdav($connection)) continue;
+    $connection_id = (int)($connection['id'] ?? 0);
+    if ($connection_id < 1) continue;
+
+    $output = array();
+    $exit = 1;
+    @exec(
+      escapeshellarg($php).' '.escapeshellarg($script).' --connection-id='.$connection_id.' 2>&1',
+      $output,
+      $exit
+    );
+    $text = trim(implode("\n", $output));
+    $decoded = $text !== '' ? json_decode($text, true) : null;
+    if (!is_array($decoded))
+    {
+      $decoded = array(
+        'ok'=>false,
+        'connection_id'=>$connection_id,
+        'fatal'=>'Diagnose lieferte kein gueltiges JSON.',
+        'raw'=>$text,
+      );
+    }
+    $decoded['exit_code'] = (int)$exit;
+    $reports[] = $decoded;
+    if ($exit !== 0 || empty($decoded['ok'])) $failed = true;
+  }
+
+  if (!$reports) throw new RuntimeException('Keine aktive WebDAV-Verbindung gefunden.');
+
+  $parts = array();
+  foreach ($reports as $report)
+  {
+    $id = (int)($report['connection_id'] ?? 0);
+    if (!empty($report['fatal']))
+    {
+      $parts[] = 'WebDAV #'.$id.': FEHLER: '.(string)$report['fatal'].' (Exit '.(int)$report['exit_code'].')';
+      continue;
+    }
+    $parts[] = sprintf(
+      'WebDAV #%d: Mapping %d Dateien, Shadow %d Links, %d passend, %d defekt, %d ohne Mapping, %d doppelt (Exit %d).',
+      $id,
+      (int)($report['mapping_files'] ?? 0),
+      (int)($report['shadow_links'] ?? 0),
+      (int)($report['matched'] ?? 0),
+      (int)($report['broken'] ?? 0),
+      (int)($report['unmapped'] ?? 0),
+      (int)($report['duplicates'] ?? 0),
+      (int)$report['exit_code']
+    );
+  }
+
+  return array(
+    'message'=>($failed ? 'Scan-Test fehlgeschlagen. ' : 'Scan-Test erfolgreich. ').implode(' ', $parts),
+  );
+}