Enable Adobe Reader 8 to verify Digital Signatures

  1. Open Adobe Acrobat/Reader.
  2. From the menu bar choose Edit > Preferences.
  3. Choose Security from the menu and click the Advanced Preferences button.
  4. Click the Windows Integration tab and there check all of the boxes.
  5. To complete the process, click Ok on the Windows Integration screen and then click Ok on the Preferences screen

Do you need anything else?