DNS with different providers

Hi, I don’t know how to proceed if out of let’s say 20 domains, I have 19 of them managed via DNS at Cloudflare, i.e. I have synchronization enabled. But now I have a domain that has DNS managed elsewhere. Just provide that other administrator with the server IP and the domain (site) will work? Thank you for any answer.

yes, just need to create A record for the domain name pointing to your server IP