I followed the instructions in this article, which states non-confluence users will be able to read and comment on published confluence articles without requiring confluence access:
"Everyone with view access to your service desk can view articles (pages) you publish without a Confluence license. You only need Confluence licenses for team members who create and update articles"
When someone from my organization in JIRA goes to view the pages of our connected workspace in the connected JIRA project, they get this message: 
Is anyone able to help explain why this is the case? Happy to provide further details about the article settings and/or project settings, thanks! For context, I'm on a free trial plan and therefore don't have the ability to edit restrictions. The article is unrestricted by default so I don't know if this has any impact.