Hi Patrick/Daisy,
I have gone through the uRL - https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/schema-mismatch-error-ad-installation-wizard-dcpromo
I have DC1 and DC2 running on 2012R2 - I promoted a new DC 2016 and everything went fine after promotion server restarted and when I logged in and checked dcpromo.log said Warning NTDS replication / Replication : 1203
The directory service could not replicate the following object from the source directory service at the following network address because of an Active Directory Domain Services schema mismatch.
object:
CN=Tom,OU=test,DC=abc,DC=com.
I also saw event ID 1450 on my PDC for the same object
I didnt see any error while promoting my new 2016 DC. But on my new 2016 DC I see the below events.
Directory service Error event ID 1791 and Warning event ID 1203 referencing the same object.
DNS server Warning event ID 4013
I found the same issue description from this URL - https://blog.markdepalma.com/?p=59
Above URL is asking to reset ACL.
Kindly suggest can I go ahead with this approach.
Regards,
Ankit