I have finally setup a certificate authority in my lab and am working on replacing self-signed certs. This week I was working on my Horizon Connection server.
When you make changes to the SSL Certificate on your Horizon Connection Server(s), you may see an error message similar to this:
Server's certificate subject name does not match the server's External URL. Server's certificate is not trusted.
When you first install the Connection Server, it uses the hostname of the server as the “External URL”. If this does not match the URL you will publish for your users, a small change needs to be made in the configuration of the Connection Server.