gm wrote:
>
> Thank you, Deji. When I change secondary zone in DNS in corp.lab,
> will I need a seconday zone for corp.lab in company.corp?
>
You've got it backwards. AD zones reside in DNS servers. DNS servers do
not have to reside in AD domains.

Your DNS servers do not have to be in particular domains. They don't
have to be in your domains at all. They could be on the moon and your AD
would still function correctly. All that DNS provides is the facility
for AD to register stuff in the AD zones that it looks after.

Think of DNS as being seperate from Active Directory and AD registering
and looking up stuff in DNS.

That said, most people these days who have AD do make their DCs DNS
servers and AD Integrated. Then they can take advantage of replication.
But it is NOT essential.

Cheers,

Cliff