>> But now I would like to try to install gluu without opendj ldap. And I would like to know if it is possible ? Not possible. Because oxAuth and oxTrust and all are configurations are saved in internal ldap server. >> If I have not an cash refressh how can I set an extrenal admin of gluu server ? 'External admin' won't be able to do any job until and unless those user's information is available inside Gluu Server. But there are multiple [authentication scripts](https://github.com/GluuFederation/oxAuth/tree/master/Server/integrations) available which necessary doesn't need user's information to be inside Gluu Server's ldap.