Do you have a recent back up that has the older version on it. If so, you could just restore back to that version and, of course, lose any new data you put on the 11.4.3.
Also, since you are running server 2019, can you spin up two VMs, run your copy of 2016 on one as the app server and either 2016 or 2019 as the DC on the 2nd VM? Of course, you would need a copy of the second Windows Server 2016 or 2019.
That would be a better setup anyway. I believe the problem is with 11.4.3 on the Windows Pro 11 machines, but if you could install a test version of 11.4.3 on the app VM, you could point to that in your "free time" and see if that fixes the problem. If it does, great, AC was right and you are fine. If it doesn't, you can now tell AC that it is on 2016 and still not working.
Of course, some of this depends on whether AC would consider the new VM with 2016 as a "new server" and have to help with the install.
Finally, did you or AC install the new version of AC on 2019?
Last edited by Bert; 11/30/2023 8:21 PM.
