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eXo User profiles also have entries in LDAP but the actual storage is still done with the Hibernate service. You will need the following parameters:
<field name="profileURL"><string>ou=profiles,ou=portal,dc=exoplatform,dc=org</string></field>
<field name="profileLDAPClasses"><string>top,organizationalPerson</string></field>
profileURL: The base dn to store user profiles.
profileLDAPClasses: The classes that are used when user profiles are created.