Hi.
Can you please provide details about what you are missing ? There is nothing different here compared to what you do when integrating CUCM or CUC with LDAP... You have to set the administrator DN and password, and the search base. Only thing is that you have to restart the PCA application after saving the settings. Then you can create admin users with their LDAP userID, checking the LDAP box so that authentication happens vs. LDAP, and giving them the permissions that they need against the Assurance Domains you have created (default is Enterprise which is the top-level domain).
HTH
/Phil