We have 2 Hyper-V Physical server which run DC. Each server has DC, CAS/Hub and Mailbox. We run on CCR while NLB for CAS/Hub. Recently when i open EMC on of Mailbox server, there is error show that time between client and server was skewed. We have 2 Active Directory Sites and each site has it own DC. I'm randomly check the time at DC, it seem all times are sync.
Hyper-V time services was enabled.
After checked on Event viewer on one of Exchange server, i found several logs.