We digitally sign PDFs with a certificate and send them to customers.
Depending on the installation of adobe reader on the client pc the customer will get a message that the signature is either correct or that the 'certification is unknown'.
When the certification is unknown, the installation of adobe reader on the client pc has no knowlegde of the chosen root certificate provider. The root provider (in this case DigiNotar) has to be imported. On some machines adobe reader will ask whether this update must be installed and on some machines not.
Can we force adobe reader to update the root certificate providers?