Enable Adobe Reader XI & Acrobat Reader DC to verify Digital Signatures

  1. Open Adobe Acrobat/Reader.
  2. From the menu bar choose Edit > Preferences.
  3. Choose Signatures from the menu and click the Verification > More button.
  4. Check the Windows Integration > Validating Certified Documents.
  5. To complete the process, click Ok on the Signature Verification Preferences screen and then click Ok on the Preferences screen

Do you need anything else?