Computers within domain cannot find agency's own website

We just setup a 2008R2 Domain Controller with Active Directory Domain Services, DNS Server and DHCP Server.
When going through the setup wizard for the AD DS role, we set the FQDN of the new forest root domain as "ouragencyname.org"
After we were done, it seemed that everything was OK: you could resolve any internal address and you could go out to any external webpage, but we found out a little later that we could not access our own website "www.ouragencyname.org" (externally hosted).
Any help will be greatly appreciated.
gcondegAsked:
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Chris DentConnect With a Mentor PowerShell DeveloperCommented:
A very common problem, it's because AD uses the same domain name as your public site. You'll need the public IP of your site for the instructions below, if you don't know it, run this:

nslookup www.ouragencyname.org 8.8.8.8

Then note down the IP it gives. Then:

1. Open the DNS Console
2. Expand Forward Lookup Zones
3. Select ouragencyname.org
4. Right click and add a new Host (A) record
5. Enter "www" in the Name
6. Enter the public IP of your site

On a client (a PC or something), run:

ipconfig /flushdns

Then browse to the site. You'll be able to use:

http://www.ouragencyname.org

But not:

http://ouragencyname.org

Chris
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gcondegAuthor Commented:
Right on the money!  Thanks so much.
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