When trying to sign a document using a .pfx digital certificate issued from a DC/certificate store (verified valid/not expired), we can get as far as selecting the certificate and specifying the reason for signing. However, when we click on "Sign" nothing happens. We are able to use third party certificates, just not the .pfx cert. This issue is on Windows 10 Enterprise x64 (10.0.14393) and Adobe Reader DC (2015.020.20042).
The same certificate works in the same version of Reader DC installed on Windows 7 Pro x86 & x64.
