Invoices in Waiting feedback

These invoices are not available for Connected! Instead, there is "Ready for download".

Where to find these invoices?

Documents that are in this status are documents that have been sent to the accountancy package, but are still waiting for feedback from that package. Which means they haven't received a voucher number yet.
After a voucher number has been received, it is set in the "Voucher number" header field and the status of the document will be changed to "Ended".