[Koha] Koha 3.0 LDAP Question?

I have been trying to configure LDAP and have a couple of questions: The Wiki says: There are two parts of the KOHA_CONF file (default location: /etc/koha.xml) relevant to LDAP authentication: the configuration stanza itself, and the "switch" line that enables or disables LDAP. The switch appears in the main <config> section, 0 for "off" and 1 for "on",.... Should I take this to mean the koha-conf.xml file? There is no koha.xml file on our installed server? If it is this file, do I simply add the LDAP server options in the config file. I have assumed that is what is needed but I can't figure out where to go from there? Is there an Admin tool to configure/test the LPAD authentication? Thanks Barry