I got an update PDF that requires the same Password, but when I try to open it, it says that it has not digital ID. How do I link the new version to the old?
Sorry for the delay in response to your query and apologize for the inconvenience caused. As per the description above, you are not able to open a password protected PDF file, Is that correct?
Please refer and try the solution in following KB doc See how to troubleshoot problems opening PDF files and other PDF related issues
If your issue is different, please elaborate. Is the issue is related to Digital Signature, or unable to open a password protected PDF?
Let us know how it goes.