I have a user who has received a SECURED document. I have attached the document properties page. My user would like to digitally sign this document. But, when she/I try to sign the document, the Signature option is grayed out. Can SECURED documents be signed? I am able to sign other documents.
It's possible if there are blank digital signature fields present.
Just to clarify what George Johnson meant. First, before you secure your PDF you need to add unsigned signature field (one or more) at the places in the document where you want the signatures to appear. Then you secure your PDF. Tehn you can sign it in the already existing unsigned signature field. If you received secured PDF from someone else and it does not contain unsigned signature fields then you cannot sign it.
Sigh, in this case the latter is true. We received the PDF from another organization. We would need to convince them to change it.
But, Thank you for your help! You clarified the relationship between password security and digital signature.