We have 2 domains I will call them here DC1 and DC2.
My AD is Windows 2012 infrastructure.
About 10 days ago DC2 started acting out kept freezing (Win 2012 R2). We did everything what was possible- rebooted the switches, server numerous times. I also removed antivirus software and then after a while server was OK for the next few hours and then was frozen again. I did reinstall the antivirus product which was always working properly .
Is there any command which is required to check if my environment my forest is ready for the newest version of AD (Win 2016)?
Should I bring to the environment a new win 2016 server DC3 first make sure everything is working OK replication, run health commands etc.
After few days should I demote DC2....if it allows me....???!