I am getting the following error"Doing primary tests Testing server: Default-First-Site\ADDNDC001 Starting test: Replications [Replications Check,ADDNDC001] A recent replication attempt failed From ADDORO001 to ADDNDC001 Naming Context: DC=ForestDnsZones,DC=gov,DC=local The replication generated an error (1256):

Hello, This is Exchange Server forum. For Active Directory issue, I suggest you write the post in our Windows Server forum:http://social.technet.microsoft.com/Forums/en-US/winservergen/threadsThanks,Elvis

Yes i know that it is an Exchange forum. My problem is the followingI have a problem when i try to install Exchange server 2003. I run dcdiag and netdiag from the command prompt. The output from the dcdiag isTesting server: Default-First-Site\ADDNDC001 Starting test: Replications [Replications Check,ADDNDC001] A recent replication attempt failed From ADDORO001 to ADDNDC001 Naming Context: DC=ForestDnsZones,DC=gov,DC=local The replication generated an error (1256):After running the dcdiag and netdiag i can get the dropdown menu on the forestprep page to run the forestprep. But when i try to run the forestprep an error message appears. The message says "Exchange Server 2003 has a known compatibility issue with this version of Windows. For more information, refer to http://go.microsoft.com/fwlink/?LinkId=37488". When i click continue the message appers again. Then it starts installing but it stops after showing some messages. The message says " Setup failed while installing sub-component Microsoft Exchange Organization-Level container object with error code 0xc103fca2(Please consult the installation logs for detailed description). You may cancel the installation or try the failed setup again.

Hi,You really shouldn't start installation of Exchange server when you have AD problems. You need to fix the replication problem first.Leif

Thank you every one. My problem is solved. Leif, you are right, i shouldn't start installation of exchang before correcting AD things. Now i corrected it and the installation went right. Thanks Everyone

Great. Thank you for your feedback.