Wrong time on Domain Controller running as guest on Hyper-V

domain-controllerhyper-vtime-synchronization

As stated in the headline our Domain Controller runs on Windows Server. This server is a Hyper-V Guest.
The Hyper-V Host is joined to the Domain.

Unfortunately the Time on the Domain Controller is off by a couple of minutes. As a result all clients in our Domain have a wrong Windows Time.

How can this (time-synchronization) be fixed?

Best Answer

The Time synchronization Integration Service should be disabled on all domain members that are virtual machines running under Hyper-V, not just the DC. Your PDCe should be configured to sync time with a reliable external time source.

On boot up, the virtual machines will get their time from the Hyper-V host (because they have no RTC of their own) and from that point forward they should be syncing their time from the domain hierarchy.

From an elevated command prompt on the domain members run w32tm /query /source and make sure that the source is your PDCe. Then run w32tm /query /configuration and make sure the type is NT5DS.

From an elevated command prompt on the PDCe run w32tm /query /source and make sure that the source is a reliable external time source. Then run w32tm /query /configuration and make sure the type is NTP.

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