We do. Our IT department uses Jive mostly to share information and announcements (they use ServiceNow to actually log and track tickets), but our HR and North America Accounts Payable teams use Jive to store information / guides, post announcements and answer user questions.
Our Jive team also helps manage our learning management system and we run all our LMS support through Jive. (How very convenient!) We post help documentation and FAQs in our Jive instance and we use the calendar function to post training sessions. We have open groups where users can ask questions and we also have private groups where learning and development or performance HR people can ask questions of a more confidential nature. We can mark discussions as questions (if the user does not already do so) so we can go through and close out queries.
Feel free to DM me if you'd like to discuss further / arrange a call.