Hi,
We have a Windows 2012 R2 Hyper-V Cluster running for several years now. On one of the hosts Domain accounts were no longer usable - had to Login using the local admin account. The VMs are running just fine - but not manageable through SCVMM or Failover Cluster Manager anymore. Powershell on hyper-v Level works.
I checked Logs... the only thing I found is in Systems: a DNS error followed by Event 5823 "The System sucessfully changed ist Password on the Domain Controller XXX. This Event is logged when the Password for the Computer account is Change by the System...".
The host is able to reach all DNS and AD servers. Name resolution works. I searched for the Event 5823 - found many entries regarding mix of AD 2003 and AD 2012... but this is not the cause of the problem as we never had an Active Directory 2003 or Domain Level 2003. Does anyone have an idea how to find the reason for this problem? I would try to use reset-computermachinepassword in hope of not having to reboot the server. Does anyone knows more about this situation and what works best?