New reports are now available in the new Office 365 admin center and the Skype for Business admin center. They are replacing the Skype for Business reports that are found in the classic Office 365 admin center.
The new Skype for Business conference organizer activity report and Skype for Business conference participant activity report will give you the same information as the old report. You can view the new reports by going to the Office 365 admin center > Reports.
Here is the list of the new reports available:
Caution: If you try to use the reporting cmdlets, you may end up with inaccurate or incomplete reporting information.