the default folder and configuration file of ldap is not be found

I will configure the ldap with alfresco Share 5.1.e and windows 2012
but I don't find the default folder of ldap in \\TOMCAT_HOME\webapps\alfresco\WEB-INF\classes\alfresco\subsystems\Authentication
So,the default configuration file of ldap ,"ldap-authentication.properties" is don't be found,too.
Next,how can I do?

thanks for help