Can I make a 2022 server an AD server on a 2012 R2 Domain?

Question

Hello,

My main server is currently a 2012 R2 server. It is the active directory server. Our secondary server which was the secondary DC died. I've done the metadata clean up. I've set up AD on it - it sees the domain and it can edit users. I want to promote it to be a DC though and under deployment even though it sees the domain when I browse. However it says an active directory domain controller for the domain mydomain.lan(Insert real name) could not be found.

I can ping the domain by name from the new server

Answer 1

Please run;

Dcdiag /v /c /d /e /s:%computername% >C:\dcdiag.log
repadmin /showrepl >C:\repl.txt
ipconfig /all > C:\dc1.txt
ipconfig /all > C:\dc2.txt
ipconfig /all > C:\dc3.txt

then put unzipped text files up on OneDrive and share a link.

Answer 2

Adding a 2022 domain controller to a 2012 R2 domain is absolutely not a problem. Might check the logs for relevant details.
https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/troubleshooting-domain-controller-deployment

--please don't forget to upvote and Accept as answer if the reply is helpful--

Answer 3

Thanks - the information is in onedrive s!AonCBRorVv74rHKIjdEk213XVw-w

Answer 4

Got nothing. Do not edit the above commands. Is it on another network? Might check the ports are flowing between networks
https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/config-firewall-for-ad-domains-and-trusts#windows-server-2008-and-later-versions
https://www.microsoft.com/en-us/download/details.aspx?id=24009

Also check the logs for relevant details.
https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/troubleshooting-domain-controller-deployment

--please don't forget to upvote and Accept as answer if the reply is helpful--

Answer 5

They are on the same network - they can ping each other by IP, they can ping each other by name.