Any advice on using Fin for both internal company questions and external support?

Hey - I believe you’d need a separate Intercom organisation for this, and even then it sounds a bit like the wrong approach. Unless your employees are spending a large amount of their time in your product (and therefore are always one click away from asking Fin a question) I would recommend building from wherever they already spent the most time.

My experience is that would typically be your chat tool like Slack, Teams or Discord. I’ve had a short search (not an endorsement, just an example) and something like Runbear would connect one of those three platforms to Confluence, and allow your team to search for information Confluence - and would likely be a lot easier than having to work out how to prevent customers from accessing internal information! 

You know your own company and business needs better, but that approach would be my suggestion!

Conor