We have been making changes to an existing pdf (using Illustrator and Acrobat) that includes form fields. The original PDF is protected so that once filled out, cannot be saved, and must instead be printed. I have been unable to find a way to recreate this in the changed pdf. Anyone done this? Adobe tech support (chat) indicated there is no way to do this with an Adobe product. If that's truly the case, does anyone know how it WAS done?
Let's see if we can find the trick.
1. What document security is set for the clever file, in full?
2. What exactly happens when you try to save it? Is there an error message?