Since we have upgraded to Reader version 9, anytime we send a PDF through email that requires a digital signature. The digital signature option is grayed out. When you check the properties of the document it says that digital signatures are not available. If we try the same document with Reader version 8 we are able to digitally sign the document. Are we doing something wrong when creating the documents? We use Adobe Acrobat 7 Professional for creating the documents. Any help would greatly be appreciated. I can send one of the documents if someone things they know what may be wrong.