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.