The Microsoft Graph collects huge amounts of signals about Office 365 user activity. Some of that data is used to generate insights into information that might be interesting to users. You can already disable insights in Delve, and now Microsoft allows you to disable insights elsewhere in Office 365. The downside is you’ve got to patch the Graph organization settings to limit insights, and that might just be outside the ability of the average tenant administrator. Unless they use the Graph Explorer to do the job.
Delve has options to export user information that seem to have been added to help Office 365 tenants comply with Article 15 of GDPR. Unhappily, the export is rudimentary and the JSON information will be impenetrable to normal human beings.