Configuring the time service on the PDC Emulator FSMO role holder
Change the Windows Time service configuration on the previous PDC emulator
Windows Time Service Tools and Settings
Configuring And Managing The Windows Time Service
Demystifying Group Policy Settings
Configuring an Authoritative Time Server with Group Policy Using WMI Filtering
High Accuracy W32time Requirements
How the Windows Time service works on an RODC
For virtual DCs; dont sync the time with the host machine. For Hyper-V you need to disable the Hyper-V time service. You need to disable the below service for DCs.
Keeping the Domain On Time-Time
<>A machine can only look for a time source in
its own domain or
the parent domain. A machine will never go to a domain on a parallel level, or a "skip-level" parent domain.
<>Within a domain, a machine cannot sync with its own kind. A DC cannot sync with another DC. A client cannot sync with another client.
Windows Time Service