This is using MS W2K3 AD Domain. Recently, due to some reason, I got no choice but to change the DC's IP from .8 to .9. After that, I did some clean-up on the AD, DNS, to make sure that DC is using .9 for all the communications.
Recently, users stated to feedback to me that they are not able to logon to the domain. Secondly, I also found that few servers, have to be remove and then re-join to the domain, why? What went wrong? How to solve it? The DC was originally a physical server, and has since been converted to be a hyperv VM.
Shall I setup a second VM DC (a clean setup), to take over the above DC?
Make sure the networking is setup properly in the virtualization infrastructure too.