Can't sign document in Adobe Acrobat Reader DC
I have a document to be signed, but the Sign button is grayed out (I see under Preferences that signing is not allowed). I can't print it either; it simply does not print when opened in Adobe, and when I open it in Preview, I get a message telling me the document cannot be viewed in Preview.
I understand that there may be a security issue with the document, that the person who created it needs to change preferences, but that person was completely confused when I told them this. Is there anything I can do? Or are there explicit instructions that I can pass along to the creator?
