If you want to authenticate the database user with LDAP Lightweight Directory Access Protocol (authentication service), create a user authenticated by LDAP. The database checks the password against an LDAP server which can be configured per database within EXAoperation. The parameter dn-string (string in single quotes) specifies the so-called distinguished name which is the username configured in an LDAP server. The SASL Simple Authentication and Security Layer and certification management are not supported.