2, Settings Acrobat signature option (to Acrobat 7 cases, including the creation of a signature appearance, set up to verify the signature )

run Acrobat software, select "Edit" menu > "Preferences"

select "When the document is open to verify signature", click "Advanced Preferences"

click " Windows Integration" tab, and check the "Enable the search Windows certificate store to find non - your own certificate. " and selected signatures and verification to confirm the documents verified.