diff --git a/src/PVE/Storage/CIFSPlugin.pm b/src/PVE/Storage/CIFSPlugin.pm
index 4cab2e1..2184471 100644
--- a/src/PVE/Storage/CIFSPlugin.pm
+++ b/src/PVE/Storage/CIFSPlugin.pm
@@ -285,7 +285,7 @@ sub check_connection {
 
     if (my $err = $@) {
 	die "$out_str\n" if defined($out_str) &&
-	    ($out_str =~ m/NT_STATUS_(ACCESS_DENIED|LOGON_FAILURE)/);
+	    ($out_str =~ m/NT_STATUS_(ACCESS_DENIED|INVALID_PARAMETER|LOGON_FAILURE)/);
 	return 0;
     }