We are using certificates from an internal CA on smart cards to sign documents.
Acrobat DC doesn't accept the signing certificate anymore. It cannot be used for signing PDFs.
In Acrobat X and Word the certificate it is working well.
Were there any changes regarding the handling of certificates for signing PDFs in Acrobat DC?
Sorry for the delay in response.
Yes, there have been changes and you may know about those changes from this link: A: Changes Across Releases — Digital Signatures Guide for IT
Let us know if that helps.