How to add attachments to a digitally signed document

I have a dynamic document which was built in LiveCycle Designer which requires multiple digital signatures and the ability to add attachments. Currently the ability to add attachments only exists when the document has no digital signatures and only with Acrobat Pro. The add attachment feature is grayed out once a digital signature is applied. This document is an enterprise document that is intended to go through a workflow (hence the reason for multiple digital signatures). Additionally the Interactive Objects menu is also grayed out on my form so the ability to add a button is not available (this is grayed out even with no digital signatures). I am open to the idea of adding a button in LiveCycle but I haven't found a JS that has worked yet (this is without me adding the complication of having any digital signatures in the form yet).

Any Ideas??

Adobe products being used;

LiveCycle Designer ES4

Adobe Acrobat Pro

Adobe Acrobat Reader DC

R/

Matt