3 Replies Latest reply on Feb 22, 2017 5:27 PM by Adorobat

    Windows Cryptographic Service Error 1400 In Adobe Reader DC When Using Signing Certificate

    joshbilsky Level 1



      Our organization utilizes smart cards for authentication.  The smart cards contain SHA256 certificates that can be used for digital signing with Adobe Acrobat/Reader.  We have encountered a number of instances recently where users receive the following error when attempting to use a certificate on the smart card to digitally sign a PDF document.


      Windows Cryptographic Service Provider reported an error: Invalid Window Handle.  Error Code: 1400


      While we are still in the process of investigating the issue, we have not been able to identify any underlying cause or commonality such as a particular document exhibiting the issue.  It does seems like the issue is resolved by restarting the workstation, but we're not 100% on that yet as we have not tried restarting in every case.  Any insight on this issue would be greatly appreciated.