Force all client to use

hello to all, I have an ar300m, configuring the dns custom addresses must also activate “Force all clients to use”?
Thank you all for the advice you want to give me

It’s not necessary but why wouldn’t you?

Some clients has its own dns settings. This option will override all clients’ own dns servers, as long as dns inquires are not encrypted.

I have tested it but I do not know any difference, so I leave it disabled.
Thank you all for your help

As Alzhao said directly above, some clients have their own DNS settings, so you might leak if you uncheck it.

For custom DNS, this option should be ignore. It will always use custom DNS even if your client has its own DNS settings.