One Drive for Business - improved audit control
Audit reporting to identify what documents our users have shared with external contacts form their OneDrive. This missing feature is holding us back from rolling out OneDrive and getting all it's benefits.
These events were made available a while back. In the UX, look in the activity picker for these events under the “Sharing and access requests activities” section.
Daniel Popper (MSFT) commented
This capability was added a while back. If you go to the audit log search page and use the activity picker, there is a full section called "Sharing and Access Request Activities", which includes all types of sharing, as well as any access to shared documents. Check it out!