We recent uncovered an issue when importing a very specific type of PDF into the repository.  We have a Excel template for a Zero Voucher that is converted into a PDF and imported , as part of support documentation for invoices. In the top right of the Zero Voucher we have an "Administrative Use Only" box that we add text box data to fill in the FY and PER area. Once we add our text boxes and send it off to be signed its combined with the other documents and imported as a new version of a document already existing in Laserfiche. What we saw was that in the import process (only on the Electronic File) the entire Admin Use Only is redacted with exception to the text boxes that we have added. 

Below is a print preview of what I am describing 

The process the user used to generate the PDF from the template is the standard Print to PDF feature in Windows. After doing several test of my own I determined that if we use the Save As Adobe PDF or the basic Save As feature and choose PDF we do have this issue.

The key difference I was able to determine between the two PDFs is the Print to PDF version was produced by Acrobat Distiller (15.0 & 16.1 in our cases) where the Save as PDF was produced by Acrobat PDF Maker for Excel.

Below is the preview of the PDF not showing the redacted area on the page

I advised the user to use the save as feature for future cases with that Template but I wanted to add this here so others can either chime in or hopefully the root of the issue can be discovered and corrected in a future patch.