Mark Heideman

That's perfect. Thanks Jake, appreciate the insight.

Nicolas Du Lac got it right.

The basic problem here is this:

If anyone can create an account in the zendesk portal, then anyone can sign in. So putting certain content behind a log-in requirement means nothing. It's just another step someone would need to make to access the knowledge base. 

As this feature suggests it would be great if there were an option to enforce approval before end-users are allowed access. This is a significant roadblock for my organization and understandably many others.