This situation is new. Lately, I was able to get signatures from my customers, and once the doc was received, I was able to save it on my computer and open it with Preview (Mac app) to view it. Now, when I do the same process, the doc is automatically blocked asking me for an unknown password. The only way I found to view the PDF doc is to open the signed doc that is registered in Acrobate ProDC software. The PDF file itself is impossible to open and view. My customers, which receive also the final version of the signed doc cannot view it either. Like me, a password is requested and most of them do not have ProDC. I removed the Security (enhanced), I do not use any protection and I do not set up a password when preparing the file to be sent for signature. I found nothing relevant in the help section of Abobe.
How can I get rid of that unwanted protection to view the file once signed?
Thanks for your help.