Having some issues with offline folder sync (not working on a handful of laptops), and in my search for a solution I was looking at the DNS and noticed we have no reverse lookup zones configured.

We are a primary school, 2 servers - 1 DC running DNS DHCP etc, 1 app server with antivirus, altiris etc.

a) Do I need reverse lookup zones?
b) Could they have any effect on offline folder sync?

I don't know much about DNS, other than roughly what it does. Is this something that would be straightforward to configure, or am I going to break everything...?