https://www.dropbox.com/account/ai
and the setting for team accounts in the admin console is here:
https://www.dropbox.com/team/admin/settings/ai
Ours (for a US business account) was on by default. The text for the setting is:
> Let team members use artificial intelligence (AI) so they can work faster in Dropbox. We only use technology partners we have vetted. Your organization’s data is never used to train their internal models, and is deleted from third-party servers within 30 days.
There's a "learn more" link that goes here:
https://help.dropbox.com/view-edit/privacy-settings-dropbox-...
Dropbox claims that they "won’t let our third-party partners train their models on our user data without consent". The page further claims that the participation option is on by default for teams "participating in the Dropbox AI alpha", but I don't think we signed up for any such thing and the option was still on for us. I checked the settings and we are not currently enrolled. I have zero confidence that "consent" to use our data for model training won't also default to opt-in.
The page further states that Dropbox currently has one AI partner -- OpenAI.