try to use AdminServicesTabFieldsSave

zimbraSingle.php

@@ -794,7 +794,6 @@ function zimbraSingle_ServiceSingleSignOn($params) {
 function zimbraSingle_AdminServicesTabFieldsSave($params) {
     $params['configoptions']['addonQuota'] = $params['configoptions']['addonQuota']  + $params['configoptions']['newAddQuota'] ;
     $params['configoptions']['newAddQuota'] = 0;
-    $results = localAPI('UpdateClientProduct', [ 'serviceid' => $params['serviceid'], 'configoptions' => base64_encode(serialize($params['configoptions']))]);
     logModuleCall(
         'zimbrasingle',
         __FUNCTION__,