Question Unable to find DNS Resolver

[Change Maker]

Server operating system version

Plesk Obsidian 18.0.73

Plesk version and microupdate number

Update #3 Web Host Edition

I'm looking to make Quad9 my only resolver on my server.

I've edited /etc/systemd/resolved.conf, but it still defaults back to Google and I don't want it to.
Apparently this could something to do with Plesk/Ionos, my Hosting provider.

Does anyone know anything about this or where can I find the DNS Resolver to hopefully fix this.

 

[HHawk]

Don't you normally add this in: /etc/resolv.conf
Not sure though. But might be a good starting point.

We use our own two internal DNS servers, which are added in /etc/resolv.conf on every server we setup.
The two internal DNS servers container several good/ast DNS providers, amongst others.