I have a question about MPI Server Certificate. From where we are supposed to take it? We are trying to integrate with JCB and they want this certificate. Here is a quote from their communication:
This certificate must be obtained from commercial CA with Commercial CA Root Certificate.
About the MPI Server Certificate, you can get certificate signed by most popular CA like GeoTrust or Verisign and so on.
In this case we use Let’s Encrypt.