troubleshooting Question

Remote site DNS setup with internal & external sites

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maderosiaFlag for United States of America asked on
Windows NetworkingWindows Server 2003DNS
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More DNS problems. This is my third post in a week about DNS

3- DC's that are also DNS servers
     Zone transfers between them for some domains
1- DNS server in DMZ to host external DNS (100 domain zones, 1 for each location + some for corp)

53 Remote Sites
1- DC that is DNS at each

Internal domain name is Active Directory Integrated and on all DC's.
20 or so other names are set up on 3 DC's as primary\secondary.

Last night, I set up secondary DNS with our ISP only changing the DMZ DNS. For some reason because of my change, this morning about 20 locations were unable to connect to internal sites on doman Here is what we did to fix but unsure if it is right. I went into the DNS console on each DC and added the DC from corp as the forwarding address where it was blank before. The sites would then resolve to the internal site. The idea was that the DNS server did not know site so asked root servers and got no response because the Host records are set up internal and not external. Appears to be working now but I do not know if that is best practice.

The domain is our comapny website but we use it as an Intranet site as well. Is it an OK setup to do this or is it common? We are using it as an internal site and an external site. How do clients know whether to look outside or internal for this setup? should go internal but is also an external website.

Is pointing all remote sites DC's to forward to the DC at corp the best way to fix this or is it best to make an Active Ditectory Integrated zone so that it propagates to all DC's? Really unsure of best practices. We only have the one Active Directory Integrated site that is our DC's domain name everything is a member of.

I am guessing that if you know DNS you will know what I am asking. I am new to DNS so I am unsure if I am asking the right questions. I will post any questions asked bythe Experts.
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