If your server/device requires a different certificate format other than Base64 encoded X.509, a third party tool such as OpenSSL can be used to convert the certificates into the appropriate format.
If your code signing certificate is stored on a USB token, Hardware Security Module (HSM) or using DigiCert KeyLocker, it will not be possible to export the certificate as a PFX file.
This page contains the DigiCert dedicated IP addresses for DigiCert Online Certificate Status Protocol (OCSP), Certificate Revocation List (CRL), and a few other DigiCert services.
To comply with industry changes mandated by the ballot, certificate authorities must stop using WHOIS to identify domain contacts for email, fax, SMS, postal mail, and phone domain control validation methods.
DigiCert - Contact CIPlus Service Management for information on the files you need to use.