Buy certificate without Port 80/443

🚧 Installation
1

Hello!
I got Nextcloud up an running for about 6 month now and I now want to buy a longlife SSL certificate.

I got one fixed IP address, Port 80/443 is used by Exchange so I set Nexcloud on a different port.

How do I get a certificate for the Nextcloud Server? Can I set up a common certificate for Exchange and Nextcloud, subdomains are i.e. exchange.domain.com and cloud.domain.com? Or even with 3 subdomains as we are thinking of a Jitsi Server as well.

Thanks for any hints.

Martin

2

You can use for every name the port 443. Perhaps because of proprietary exchange it does not work with virtual host. Perhaps you need then a reverse proxy. Use Lets Encrypt for free.