06-11-2019 12:40 AM
06-11-2019 12:51 AM
Go to admin center - reports - OneDrive! There's 180 days history there but it can take 24-48 hours til it shows
Also you can use the audit log in the security and compliance center to search for lot's of different kinds of file and sharing activity!
06-11-2019 11:08 AM
What exactly do you understand by "live reports for OneDrive active users/files"? The closes you can get to real-time data is what Adam mentioned above. Unless all you care about is the sharing scenario - for that you can configure notifications via the BccExternalSharingInvitations parameter, or configure a transport rule that adds additional recipients.