I have some documents that have Security Method: Password Security, and I would like to remove this security using Adobe Acrobat Pro DC. I have the original password as well.
When I open the document no password is asked for. When I try to change de Security Method in Document Properties I get the message: "You cannot change security on this document because the current document is signed or certified".
It's not signed, it's an empty form.
What am I doing wrong?
Attached an example pdf form.
Edit and convert PDFs, General troubleshooting, PDF forms