diff --git a/apps/files_external/lib/Command/Notify.php b/apps/files_external/lib/Command/Notify.php
index e20a859ceb..734d7b162a 100644
--- a/apps/files_external/lib/Command/Notify.php
+++ b/apps/files_external/lib/Command/Notify.php
@@ -152,6 +152,15 @@ class Notify extends Base {
 			$mount->setBackendOption('password', $passwordOption);
 		}
 
+		try {
+			$backend = $mount->getBackend();
+			$backend->manipulateStorageConfig($mount, $user);
+		} catch (InsufficientDataForMeaningfulAnswerException $e) {
+			$noAuth = true;
+		} catch (StorageNotAvailableException $e) {
+			$noAuth = true;
+		}
+
 		try {
 			$storage = $this->createStorage($mount);
 		} catch (\Exception $e) {