CertificateStoreName - Certificate store name. See -store. CertId - Certificate or CRL match token. See -store. PFXFile - ...

CertificateStoreName -- Certificate store name.  See -store.
CertId -- Certificate or CRL match token.  See -store.
PFXFile -- exported PFX data output file
Modifiers -- Comma separated list of one or more of the following:
        %5 -- Do not export the certificate chain
        %6 -- Do not export the root certificate
Defaults to personal machine store.