Well since we are going through a firewall, I'm trying to plan for the future here.
So would it make more sense to setup a Stub zone on the 'DomainA' DNS for the 'DomainB'? This way if we have future 'DomainA' servers that would have need to find computers in the 'DomainB', I won't have to create additional firewall rules just so the new 'DomainA' servers can reach the 'DomainB' DNS.
I've never done a Stub zone before on a DNS but it looks simple enough to setup.
Are there any problems with going this route?