Troubleshooting Active Directory replication conflicts requires several steps.

1. Identify and address the root cause of the replication conflict.


2. Ensure the local and remote domain controllers are currently communicating.


3. Verify that important replication ports and services are unrestricted to allow replication traffic.


4. Check for a potential DNS issue not allowing the DCs to be found.


5. Check that the appropriate security settings and rights are in place for the account used for object replication.


6. Check that a proper connection object from the local to the remote domain controller exists in Active Directory Sites and Services


7. Ensure that the replication topology is valid and is not missing any important connections.


8. Check the replication queues on both domain controllers to make sure the changes are flowing between the two.


9. Check the replication metadata which provides information about the changes the DCs have already replicated.


10. Resolve the conflict user manual or automated methods.