Wildfire doesn''t return extra searchFields from external LDAP store

We have reconfigured our Wildfire instance (2.5.1) using the configuration option (we use an LDAP backend for authentication and authorisation)

When searching, we can now successfully search based on LastName (sn), however when the search results are returned, only the uid, cname and mail are displayed in the search results - no LastName displayed. We have replicated this using both Spark and Exodus jabber clients.

Is this expected behaviour?