Hi @gchiu,
I would suggest using
https://mozilla.github.io/server-side-tls/ssl-config-generator/
You can then find the corresponding configuration lines in your web server configuration files and change them to those that the Mozilla generator suggested to you. In particular, if you choose “Old” instead of “Intermediate”, it will generate a configuration that will work with older clients. (The configuration that you have now is probably your web server’s default for HTTPS; unless I misread something in that recipe, I don’t believe that the recipe actually changed the defaults when enabling HTTPS.)