By default, when virtual machine is created on Hyper-V host, its clock is "bound" to the virtualization host operating system clock via Hyper-V integration services. If there are two or more virtualization hosts in the same network, it may happen the operating system time on one of the hosts to be different comparing to another host.
List of useful resources and brief information
Netdom (part of Windows server support tools)
netdom query /domain:<myDomainName> fsmo