I changed only limit_web_quota with clients_update with remoting client api. It seemed to me that the change was successful with no problem. But, In fact, it hasn't been successful. Because, all client's passwords, except me, were changed. I wrote $record_record = $client->client_get($session_id, $record['client_id']); $record_record['limit_web_quota'] = 10; $client->client_update($session_id, $record['client_id'], 0, $record_record); in this script. I guess this api encrypt client's password again for changed passwords are also begin with $1$ salt. This terrible problem is resolved yet. Does anyone know a solution?