I ran into an api which connects in a way that I never have seen before.
First I had to generate a certificate request and send this file to the organization.
They send me a .pem file which I installed on the windows server.
They accept API calls with a SNI header for the SSL-handshake.
Now I've never worked before with a SNI header. Can someone tell me a little bit more how this works and how to set this correctly in the header?
Please let me know if you need more information.