Verify that the following has been configured.
1. An Active Directory collection has been configured.
2. A Exchange Tracking log Collection is running
A Mailbox Content collection is running against the mailboxes you wish to show data in the auditing insights
Make sure to set your Internal Domains.
1. Within the UUCS Analytics console go to Admin Settings
2. Select Classifications
3. Set all your Internal Domains and wait for the collection to be run again to reflect the correct data in the reports.