Enable social sharing for DPS enterprise APP

Hi,

My client is trying to use social sharing feature (share the article on someone's facebook wall) in the enterprise app for some reason. I have tried to build the enterprise iOS app from APP builder and the social sharing function didn't work at all ( the error message: unable to share. Sorry, this article is not available for sharing ).  I think maybe the enterprise APP is for internal usage and not able to share any content outside the company. Does anyone have any experience about putting sharing feature inside enterprise app? Please advise. Thanks a lot.

Andy