Here is the code I used to retrieve config for the plugin (including the 'normal' config in other admin settings, and the field locking config needed for user profile fields): // Note: The user profile field locking information is stored under // the wrong plugin name (with a slash) so this cannot use the normal // get_config function. $records = $DB->get_records_select('config_plugins', 'plugin=? OR plugin=?', array('auth_sams_soap', 'auth/sams_soap'), '', 'id, name, value'); $associative = array(); foreach ($records as $rec) { $associative[$rec->name] = $rec->value; } self::$cachedconfig = (object)$associative;

Go in Home / ► Site administration / ► Plugins / ► Authentication / ► Manual accounts Set Surname or other field(s) to "Locked" Log in with a student account Go to Settings/Edit my account Make sure the field is not editable Please note that there is an open issue for Description field - MDL-37704