Acrobat Pro/Standard PDF Printing.
Shame this isn't a bug bounty or I could possibly get some pennies!
In short, PDFs created in older versions of Adobe do not work with the most recent edition you guys have released.
A client of ours was missing text when printing, after months of painful driver changes etc, we had found a resolution.
Any user that creates a PDF in older Adobe software, will not be able to have a colleague print all text/docs/stamps/markups/borders/lines on a PDF within Acrobat. Only downgrading the user to an older unsecure, unsupport Adobe product works.
Adobe Reader 11.x/11.x.21 - Installing this then prints the text/docs/stamps/markups/borders/lines that are being missed when printing from Acrobat.
Adminrite (Admin, Adobe) commented
Thank you for reporting this issue. It would really helpful for us if you could provide a sample PDF document.