Environment:
Active Directory Domain Services (AD DS) deployment with 5 Domain Controllers (DCs)
Primary Domain Controller (PDC) and 2 Additional DCs (ADC1 & ChildDC1) at the Datacenter (DC) site.
2 Additional DCs (ADC2 & ChildDC1) at the Disaster Recovery (DR) site.
Problem:
We are experiencing intermittent replication failures between the PDC located at the DC site and the DR site AD nodes (ADC2 & ChildDC1). This occurs sporadically (2-3 times a day) and does not follow a specific pattern or timeframe.
During these incidents, accessing file shares (Admin Share/network share) from the PDC to the DR site DCs becomes unavailable.
Troubleshooting Performed:
Verification of open firewall ports for necessary AD DS replication traffic between sites.
Network monitoring during incidents confirms no blockage on the connection between DC and DR sites.
DNS and NIC configurations ruled out as the issue is not persistent.
Temporary Resolution (Workaround):
Disabling and re-enabling the network adapter on the PDC momentarily resolves the replication issue. However, this is not a sustainable solution as the problem recurs.
Event Logs:
No relevant events are found within System, Application, or Network Profile logs during these incidents.
Request:
We kindly request assistance from Microsoft engineers to diagnose the root cause of this intermittent replication failure and provide a permanent resolution.
Additional Information:
Can be provided upon request (e.g., AD DS version, specific replication error messages if identified in the future).
