We are using AEM 6.5.0 and I'm wanting to know how to create a button to attach a file and if there are any issues with it. In other postings I have read where this function does not work without Reader Extension.
Please refer to the sample PDF below which has a button to add/remove/open the attachments. It would work in Acrobat Pro, but to make it work in Acrobat Reader DC you need to Reader Extend the PDF.