I have a form I created using Adobe Designer. It's setup to email a specific group upon submission. When someone in that group responds to the email, they HAVE TO do a "Reply All" for the form to stay attached. If they forward the form it's no longer attached. How to I tell the form to stay attached when forwarding and/or reply all?
You can't control the way a user responds to you e-mail from within the form.
All you can do is to provide a how-to in the body of the e-mail you're going to submit to the group first.
I don't think that is a setting that can be controlled by the form, that is normally a mail application setting.
There may be a setting you can change, but that is beyond the scope of this forum.