And by default, the Hyper-V Host enables Time Sync so you have to be cognoscente of this when setting up VMs, especially DC VMs. That's actually what brought this topic up. I'm in the process of replacing a 2008 DC at one of these sites with a 2012 DC.
Time Synchronization predated Hyper-V. The conventional method is to setup the DC with the PDC Emulator role to synchronize with the outside time source. Since Hyper-V does time-slicing and some other stuff, I prefer to still setup my DC to get its time from the outside and let everything else sync with it. Hyper-V Time Synchronization Service - Windows 8 Service. Synchronizes the system time of this virtual machine with the system time of the physical computer. This service also exists in Windows 10. Startup Type Aug 23, 2011 · To partially disable the Hyper-V time synchronization provider, leave Time synchronization enabled under Integration Services and run the following command from an elevated command prompt on the guest domain controller:” reg add HKLM\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\VMICTimeProvider /v Enabled /t reg_dword /d 0 The DC was using the VM IC Time Synchronization Provider as time source. In my case I wanted my machines to sync from my DC and the DC from the pool.ntp.org timeservers. Here’s howto: First use the following command to partially disable time synchronization on your hyper-v dc’s (just overwrite the existing value).
Sep 27, 2018 · Disable Hyper-V Virtual Machine Time Synchronization. Forrest McFaddin September 27, 2018. August 15, 2019. No Comments. on Disable Hyper-V Virtual Machine Time Synchronization. This script will disable the Hyper-V Time Synchronization Integration Service, for all VMs in a VLAN you specify. The VLAN would be the “tagged” network within a the Virtual Machines network settings.
I did a fair bit of testing, and, as of 2012 R2, this is how Hyper-V and the Hyper-V Time Synchronization Service interact with a guest virtual machine: Hyper-V is responsible for time operations when the guest is off, the Hyper-V Time Synchronization Service is Hyper-V “maintains” the guest’s Feb 28, 2020 · Hyper-V: Configure Time Synchronization for a virtual Domain Controller. Hyper-V Manager. Open Hyper-V Manager , select the DC VM and click Settings …. Click Integration Services and clear the Time Synchronization PowerShell. Conclusion. Dec 04, 2017 · For a Hyper-V guest, open its Settings dialog box and open the “Integration Services” tab. Clear or set the checkbox for Time Synchronization as desired. For other hypervisors, consult the manufacturer’s documentation.
May 26, 2020 · Hyper-V PowerShell Hyper-V: Configure Time Synchronization for a virtual Domain Controller Time management is one of the most critical things to take care off in an Active Directory (AD) domain.
Apr 03, 2011 · If I stop both the W32Time and The Hyper-V Time Synchronization Service, the VM's clock just ticks merrily along in virtual time. If I restart the Hyper-V Synchronization service, then the time gets re-synced but there is no event left behind in the event log as evidence of this (testing with a W2K3 Std VM but that shouldn't matter). May 23, 2016 · In Hyper-V virtualization, a guest virtual machine has something called “Integration Services.” By default, all of these services are pretty much enabled, including time synchronization. The other provider is for Hyper-V and synchronizes virtual machines (VM) to the Hyper-V host. When multiple providers exist, Windows will pick the best provider using stratum level first, followed by root delay, root dispersion, and finally time offset. Hyper-V Time Synchronization Service is unable to start, if the Microsoft Hyper-V Guest Infrastructure Driver service is stopped or disabled. Restore Default Startup Type for Hyper-V Time Synchronization Service Automated Restore. 1. Select your Windows 10 edition and release, and then click on the Download button below. Configure your Hyper-V hosts to point to the same external time source (s) as the virtualized forest root PDCE. Regardless of whether your Hyper-V hosts are joined to the same domain or not, you want them to be able to reach a reliable time source if the virtualized DCs that run inside them are down. The NtpClient provider, which gets information from time.windows.com. The VMICTimeSync service, used to communicate the host time to the VMs and make corrections after the VM is paused for maintenance. Azure hosts use Microsoft-owned Stratum 1 devices to keep accurate time.