Question : Active Directory Not Replicating to Multiple Domain Controllers

I have a client using Windows Server 2003 with two domains (CCIHAM and CCIP).  CCIHAM is located in Louisiana and is the primary domain.  CCIP is a resource domain located in California.  My problem is while creating users in the CCIP domain.

I have two domain controllers in California and 1 DC in Louisiana.  All user accounts are created on a server in Lousiana in the CCIHAM domain because that is the ONLY place Exchange is installed on.  In AD Users and Computers I change the domain to CCIP.

If I create a user on a DC from California I can see the user on both California CCIP DCs but not on the Lousiana CCIP DC.  If I create the account on the DC in Louisiana I can only see it on that DC and not on the other two.

To further complicate matters, I can not log in to OWA with the accounts I create.  We also tried getting into Outlook however we couldn't get in there either.

I really need the help as I have been struggling with this for a week with no love.  Thanks in advance as always...a

Answer : Active Directory Not Replicating to Multiple Domain Controllers

That looks like a connectivity problem between the DCs, as well as probably some name resolution issues as well. Do you have firewalls in place between the two sites?   If so, you're better off using a site-to-site VPN, since AD replication requires a number of ports to replicate properly.

You should also run a netdiag to determine whether name resolution is functioning between the two domains.  AD lives and dies by DNS, so if your name resolution isn't working, you're toast.  Be sure that you can ping the DCs in siteA from siteB by their IP address, by their FQDN, and by the GUID that's listed under the _msdcs domain in the DNS management console - same thing for pinging siteB from siteA. Also be sure that you can ping "domain.com" and have it resolve to the IP address of a DC.