Before you can do the next step you need to determine if you have a valid LDAP user available for the LDAP connection or you'll have to create one. Because I prefer to have a separate LDAP user per service (from administrative view) I created one and gave the LDAP user read permissions on the tree:
Provide the credentials from the LDAP user you just created:
Select the user containers in the LDAP source:
Add LDAP use containers like this:
In the configuration tab you now have an user source:
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