Apologies as this is a developer asking questions about networking
Internally we use names such as
myname.subdomain.domain.co.uk
Apparently this is because we using a forest(?). My question is, is this a name that can be accessed via the internet as well as the intranet
If this is in the wrong category please change it
The answer is yes
"So, if the server that is going to host your sub sub domain has IP 1.2.3.4, your DNS records should be like this :
sub2.sub1.domain.com. A 1.2.3.4
www.sub2.sub1.domain.com. A 1.2.3.4
If you want to use CNAME records :
sub2.sub1.domain.com. A 1.2.3.4
www.sub2.sub1.domain.com. CNAME sub2.sub1.domain.com."