Still waiting for an explanation as to why Quickbooks thought this feature should be removed. Again it is essential for our business to be able to see an invoice's history and activity (including WHO sent the invoice, when they sent it, and WHO opened it) directly on the invoice.

Not in another tab. Not on a different page. 

Quickbooks, please explain why this was removed and when we can expect it to be reinstated. 

Until then, we are still operating under the assumption that we will have to move to a different accounting software in the new year.