The technical team has successfully resolved issues with the domain controller advertising on the secondary domain controller. This was accomplished through demoting, re-promoting, changing the machine name and IP address, and manually forcing DFS replication using PowerShell. As part of the resolution, we also had to address a problem with SYSVOL not performing an initial replication. This was resolved by setting the max content freshness time to the maximum allowed (999 days), then forcing DFS replication and finally setting content freshness back to 60.