The Third-Party AI features are not available to everyone yet. The features are in alpha and are only available to customers on Dropbox Professional, Essentials, Business, Business Plus, and some customers on Dropbox Standard and Advanced.
If you’re on a Basic, Plus or Family account, or you’re part of one of the other groups that don’t yet have access, the Third-Party AI features won’t be available to you.
It’s not in any of the articles, but in dropbox forums:
Cool, so we have to just keep thinking about it and checking in to turn it off. Great way to combat a wave of people opting out.