This site retired an old 2003 DC. It is a small company with a single server which is AD, DNS & file server. This server was "domain.priv". We abandoned the domain completely, popped in a 2012 R2 box & named it as domain.org (they own the domain name but their website, email, etc is hosted with network solutions thus if you ping domainname.org it resolves to a network solutions public IP.
To complicate things a bit every machine in the building has 2 NIC's. Once nic is for the inside network (192.168.46.*) & has no gateway. The other nic connects them to the internet via DHCP from a comcast router.
We joined all pc's to the new domain. However, we are having big time dns issues meaning logins take forever, gpo won't apply (cannot resolve), etc.
I am not at all great with dns. What are my options? I was considering renaming the domain to domain.local using this how to:
Any help would be hugely appreciated.