How can I reflect my own certificate of custom domain?

Hello. I am using custom domain and already have my own certificate for my domain on my rental server.

Although I have set up to point at the Netlify servers on my DNS, in the SSL/TLS certificate section I still have a message that says “mysite.com doesn’t appear to be served by Netlify”.

How can I reflect my certificate to mysite on Netlify?

I’m not sure exactly what you’re trying to do but hopefully you can give some more details.

If you already have a server somewhere else, you should not have a netlify site with the same name. You’d point DNS directly to that server and install your own certificate there.

If you wish to use your own certificate with a netlify site, you’d have to get it in a format we can use (see https://www.netlify.com/docs/ssl/#custom-certificates for details - but it will involve more than “what’s currently on your server” most likely) and input it on the site, and then adjust dns to point to us and not your server.