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 27, 2019 · Time synchronization; This Hyper-V integration service can be used to synchronize the system time of the VM and the host server, which is crucial when performing operations in a single virtual environment. Data exchange; This Hyper-V integration service is also known as Hyper-V Key/Value Pair Exchange. The Hyper-V Host was set to sync its time to the virtual domain controller. All should be be well… But actually not… There is a feature in Hyper-V I was unaware of that basically allows all of the Virtual Machines to sync their time to the physical host. Synopsis: When placing a Virtual Machine on the Azure Platform, by default it inherits time controls from the underlying hypervisor: Hyper-V. The default behavior for these VMs is to synchronize the system clock with the host via the Hyper-V TimeSync service (VMIC) for Hyper-V hosts and guests running prior operating systems to Windows Server 2016. Aug 27, 2010 · Bonus Tip: Time Sync on the Hyper-V Server. All the machines above are running on Windows Server 2008 R2 as the Hyper-V host. Follow Microsoft’s recommendation, the host is not joined to the domain since the domain controller is running as a guest. To keep the host’s time in sync, I set it to client mode and pointed it at the SBS domain Sync-n-Scale Windows Time Service supports Windows Server 2012 R2, 2016, 2019 and Windows 10 operating systems at the Hyper-V level. The NIST DC consistently measures the Sync-n-Scale enabled Windows System Clock, both physical and virtual, at RMS 55 microseconds diverged from UTC(NIST). Apr 25, 2013 · Disable Time Synchronization in virtual machines Currently Windows Server 2012 with Hyper-V keeps as deliverable the Time Synchronization in many needed using the timing via Active Directory (NT5DS). Question: Time Synchronization in Hyper-V. There is a lot of confusion about how time synchronization works in Hyper-V – so I wanted to take the time to sit down and write up all the details. There are actually multiple problems that exist around keeping time inside of virtual machines – and Hyper-V tackles these problems in different ways.
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
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.
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
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.