You should be able to run
openssl pkcs12 -export -out certificate.pfx -inkey privkey.pem -in cert.pem -certfile chain.pem
which will prompt you for a password for your pkcs12 file
You should be able to run
openssl pkcs12 -export -out certificate.pfx -inkey privkey.pem -in cert.pem -certfile chain.pem
which will prompt you for a password for your pkcs12 file