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
        %9 -- Include extended properties
        %10 -- Do not encrypt the certificates
        %11 -- Encrypt the certificates
        %12 -- Export Parameters
Defaults to personal machine store.