User-460007017 posted
Hi Andrey.IIS,
HTTP 2.0 is the next generation of HTTP that allows multiplexing of multiple HTTP 1.1 connections inside one HTTP 2.0 connection.
So Server_Protocol always return HTTP/1.1.
So if you wonder if the request is connected via http/2, then you could check whether the response server is IIS 10 and whether the request is connected via https.
No server variable can display http/2 directly.
If the reply is helpful, it is appreciated if you could mark it as answer.
Best Regards,
Jokies Ding