Hi,
I would like to setup limesurvey, where the survey admnistrators and participants are users inside the same windows active directory, but i am encountering the below problems:

1) For the administrator who wants user authenticates using active directory, config
*set auth_webserver to true in config.php
*enable authentication at the webserver side

but i can't found the "auth_webserver" in the config.php file. does it just create the value is ok?
www.docs.limesurvey.org/Optional+settings


2) does the any method to track participants login?