I'd like to be able to report on whether or not invoices have file attachments included or not.
This would be used to audit procedures. For example, every Order Based invoice needs to have a file attachment. For us, the file attachment would be for the receiving paperwork.
Expense invoices report that shows all Expense invoices and and indicator if there are file attachments

I would be auditing to make sure that proper backup documentation is added to the expenses.