I don't see the Documents feature in my Office add-in. Where is it?

The Documents feature is still in an invite-only beta phase. If you have a Pickit Business account and want to try it out now, you're welcome to request early access here.
If you've signed up for the Beta access and see Documents in your admin panel, but not in the add-in, it might be because you haven't uploaded/shared any documents yet. In order for the tab to appear in PowerPoint, you need to have at least one shared document.