On the Frontend, my users are unable to see the "Attachment" tab when composing a new article, however they do see the "Attachment" tab after authenticating to the backend. The users have the Publisher privilege and I have enabled the "Attachment" tab to be available in Frontend editing.

Thoughts as to why the "Attachment" tab is not showing on the Frontend?

Screen shot showing what the user sees in the Frontend : i.imgur.com/P7qCKKh.jpg
Screen shot showing Frontend editing and attachment enabled: i.imgur.com/hJQlLuz.jpg
Screen show showing "Attachment" tab exposed on the backend: i.imgur.com/t7KTb9p.jpg

Hello Tom,

This is not K2's default frontend form.
It is more than probable that the template you are using does not the include the attachments code.