Updated Jun 29, 2018
For Zendesk Users
The unpublish option will not be available for articles in a site connected to a Zendesk account. If you want the article to be unpublished from your Zendesk Help Center you will need to do that in Zendesk.
I recall seeing this option in the past but now I don't see it. Was this feature removed? Need to temporarily unpublish articles in a chapter so I can export the rest of the manual as a PDF (the chapter in question is a collection of PDFs, which I don't want to include in a PDF version of the manual).
Emily - is your site connected to Zendesk? The unpublished option is not available for articles connected to Zendesk. A workaround would be to create an unpublished chapter in the same manual, move the article into that, export the PDF, and then move the article back to the regular chapter.