Hello, I'm using Acrobat 9. I know that it's not possible through Edit->Preferences but somewhere there's a value in the registry. I haven't been able to find that yet.
The closest I've come references commenting. In case that helps you:
http://forums.adobe.com/thread/304254?decorator=print&displayFullThread=true
thanks much!
But I believe you are more interested in the Author name used on the comments? On the Preferences dialog, under comments, there is a setting for "Always use User Name for Author Name". The setting is a bit deceiving. If it is checked Acrobat actually uses the "Collab.user" property as the author. This property is defaulted to the user name. Normally it would only be explicitly set by joining a comment and review session (also called a Collaboration session). But you can change this setting yourself for any document open in Acrobat.
Run this code in the Console Window
Collab.user = "My Name";
This setting is only valid for the current document. You'll need to run the code each time you open a PDF you want the name to be different on.
This could be automated, depending on your workflow.
Thom Parker
The source for PDF Scripting Info
www.pdfscripting.com
Very Important - How to Debug Your Script