Same "Document Will Save" Action on every document?

Hello Everyone,

      Our client uses Adobe Acrobat Pro DC at their office and they have a retention policy in place for the documents they keep on their systems in the office. I've written a  script that sets the document info keyword field to the retention period that they've selected.

     Upon saving the document the user is prompted to set the retention policy with a popup. However, this only works if the "Document Will Save" event is set. It's my understanding that the JS in "Document Will Save" is set on a per document basis. I can't expect my clients to set this action on every single document they open.

Is there a way that i can set this action on any document they open from their copy of Acrobat?

All suggestions are welcome!

Thank you so much!   

    Bob