Full Hostname in Server/System Settings...

Been years since I had to do a Plesk setup on a server.
I have a FQDN subdomain setup to use as a hostname.

server.domain.com

Is this what I place into Server/System setup in "Full Hostname" ??

Does this hostname have to be placed anywhere else within my Windows Server 2019 settings?
I sorta remember mailenable needed it entered as well.

THANKS