I am having great difficulty in finding how, from within BOOKS or ANALYTICS, I can get a report of all the timesheet entries against a client/project etc in BOOKS that not only tells me that the time entry has been approved and invoiced but shows me the invoice number for the invoice that included the time log.

We can see the invoice number if we select the time log entry in the Timesheet data screen of BOOKS under Time Tracking (it shows up only on hover or select) but I am just unable to get this CRUCIAL pièce of information in any report or even better, export.

Does anyone have any suggestions on whether this is possible, if not why we can't get this or how I might otherwise get this information?

In my particular case, the timesheets are captured in PEOPLE and pushed, after approval, to BOOKS from there they are invoiced.