Hello!
Maybe this question should be posted on the Windows Server forum, but there's a chance that some one did experience the same issue exactly with the same network configuration as I did.
I have a testing environment containing two host servers (Host1 and Host2). Host1 contains the VM with the domain controller (DC), OS = Windows Server 2012 R2. Host2 contains the VM with Exchange 2013. All firewalls are turned off.
Starting today I began getting this error on my Exchange 2013 VM (and Exchange whould stopp responding):
Image may be NSFW.
Clik here to view.
This error means Exchange can't contact Active Directory, but the DC VM is up and running, DC does not have any errors in the logs, it can be easily accessed from the Exchange server machine.
I've eventually managed to find out that the cause of this issue is the DC's firewall: it either spontaneously turns on or keeps turned off but behaves as if it was turned off. Switching it ON-OFF resolves the problem.
Image may be NSFW.
Clik here to view.
I deployed Windows Server 2012 R2 on my test DC for the first time, all my previous test labs were built on DC with Windows Server 2012 and I never had this issue before.
Is it a Windows Server 2012 R2 bug?
Thank you in advance,
Michael
