Hello Shannon Maddox,
Thank you for posting in Microsoft Community forum.
How many DCs are there in the domain now?
Please check the AD replication between the two DCs first. Run the commands below on PDC.
repadmin /showrepl >C:\rep1.txt
repadmin /replsum >C:\rep2.txt
repadmin /showrepl * /csv >c:\repsum.csv
Please try the possible solution in the similar threads below.
Problems with DFSR SYSVOL, NETLOGON replication - Microsoft Q&A
DFS Replication issue with event ID 4012 (windows server 2016 - Microsoft Q&A
I hope the information above is helpful.
If you have any question or concern, please feel free to let us know.
Best Regards,
Daisy Zhou