Hi,
I’m OK with option B if it works, but I am having lots of trouble getting the Exchange to pass that through.
I found another forum post that gave a config file with exchange settings ( Haproxy and url rewrites to internal servers and urls ) , but exchange just fails with 503 service unavailable, no server is available to handle this request. It accepts the haproxy connection and the ssl certificate is correct and it redirects me to the owa but then comes up with a 503 error.