I have a template PDF document which is read at runtime. Some form fields are pre-filled for the end user and some other PDFs are appended and saved out as a different document. According to Adobe, the Extended Features settings will be lost when the file is changed. I was hoping that I could reset these settings on the new file by using the DocumentPrivilige and PdfFileSecurity class. So far, nothing has worked. Has anyone had similar problems? All end users will view the PDF using Adobe Reader and will want to complete the form fields for future reference.