How to Fix Adobe Acrobat Not Displaying All CAC Certificates
Question details
The user needs to make all military Common Access Card (CAC) certificates available for selection when digitally signing a PDF.
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Digitally signing a PDF document using a military CAC.
- Observed behavior
- Adobe Acrobat only displays one of the three CAC certificates in the signing dialog, despite all of them appearing in the application preferences.
Ensure your CAC reader is properly connected to your computer and that you have your PIN ready before attempting to sign any documents or change middleware settings.
Update Software and Reconnect Card Reader
Updating your software and refreshing the hardware connection often resolves certificate recognition issues.
Outdated software or temporary hardware communication glitches can prevent Acrobat from reading the full certificate list from your smart card middleware.
Check for and install the latest updates for Adobe Acrobat and your CAC middleware, such as ActivClient, via their respective update menus.
Safely remove the CAC card reader from your computer's USB port, wait a few seconds, and plug it back in firmly.
Completely close Adobe Acrobat and restart the CAC middleware service, then reopen Acrobat to refresh the connection.
Attempt to digitally sign the PDF again to see if all three certificates now populate in the selection window.
Verify Certificate Validity and Usage Properties
Adobe Acrobat automatically filters certificates based on their intended usage; only those valid for digital signatures will appear in the signing dialog.
Consult Your Organization's IT Administrator
If local troubleshooting fails, security policies enforced by your organization might be restricting certificate visibility.
Sign PDFs Seamlessly with WPS Office
WPS Office provides a lightweight, highly compatible PDF editor that makes digitally signing documents straightforward. It easily interacts with system certificates, allowing you to sign professional documents without complex software configurations.
- 1. Open your document: Launch WPS Office and open the PDF file you need to digitally sign.
- 2. Access the Protect tab: Navigate to the 'Protect' tab on the top ribbon and click on the 'Sign Document' or 'Digital Signature' option.
- 3. Select your certificate: Choose the appropriate digital certificate from your system's prompt to authenticate your identity.
- 4. Place the signature: Click on the designated area within the document where you want the digital signature to appear, then save your file.
Frequently Asked Questions
Why does Adobe Acrobat filter out some of my CAC certificates?
Adobe Acrobat automatically filters certificates based on their intended 'Key Usage'. If a certificate is designed only for encryption or authentication and lacks the 'Digital Signature' property, Acrobat will hide it in the signing dialog to prevent improper signature usage.
How do I check if my CAC middleware is properly installed?
You can open your middleware software (like ActivClient) directly from your system tray or Start menu. If the application opens and successfully reads your inserted card, displaying your credentials, the middleware is installed and functioning correctly.
Does WPS Office support digital signatures using a smart card?
Yes, WPS Office supports digital signatures. As long as your smart card certificates are properly installed and recognized by your operating system's internal certificate store, WPS Office can utilize them for securely signing PDFs.
What should I do if my certificates display as invalid?
If your certificates show as invalid, you may need to update your system's Root Trust Store, install the latest organizational Root Certificates, or contact your IT administrator to renew your CAC if the certificates have officially expired.
