Now that Dropbox has added Vault to Professional, the only way I can access the Vault is the web interface, the Dropbox app on my iPad, or the Dropbox app on my Android phone. The vault does not show in the Dropbox for MacOS app or in my Dropbox folder in Finder. I even stared it in the web interface and when I look at stared folders in the Dropbox app it doesn't show.