I created a static form in LiveCycle. Then, in order enable the reader rights and allow users to add attachments in the comments, I opened it in Acrobat Pro and enabled the rights and distributed it. But, when it's posted on the intranet, the user sees an Internet Explorer pop-up asking if they want to open or save the file. If they open it, it opens in the IE browser and they can't add attachments or submit the form.
the Reader Extensions you can apply with Acrobat are not enought to allow file attachments.
This right can can only be applied by LiveCycle Reader Extensions Server.