From the Workfront Project / Documents view, you can easily see when documents are linked from Box. Clicking on that Box link allows you to collaborate on word documents in Box and benefit from the tool's cloud versioning.
However, if you navigate to a document's details page, the Box icon disappears and the document is able to be downloaded directly, rather than taking you to Box where it "lives."
This has caused a lot of confusion, especially when you are tagged to review a document, receive an email that gives you a link to "See it in Workfront" and it directs you to the Document Details page (which doesn't have the Box icon/link). Many reviewers have uploaded new document versions with changes thinking there is no source file in Box to review.