Effective August 1, Facebook no longer allows any third-party applications to publish on an End-User’s wall, due to changes made to its Application Program Interface (API) documentation. As a consequence of this change, Iridium Mail and Web no longer supports Facebook posting. The Facebook option will be removed from the Iridium Mail and Web App in an upcoming app update release.
 
Please note, users currently trying to post via the Iridium GO!^® on Facebook will receive an error message back from the server about permissions. See below:

Requires either publish_to_groups permission and app being installed in the group, or manage_pages and publish_pages as an admin with sufficient administrative permission