The Windows Time NTP client uses UDP port 123 for both source and destination sync requests.If you have a computer with multiple network adapters (is multi-homed), you cannot enable the Windows Time service based on a network adapter.

For more information, see Support boundary for high-accuracy time and see Accurate Time for Windows Server 2016. You can achieve down to one-millisecond time accuracy in your domain. The PDC emulator operations master in turn is configured to synchronize time with an external time source. An exception to this is the domain controller, which functions as the primary domain controller (PDC) emulator operations master for the root forest domain. Most domain-joined computers have a time client type of NT5DS, which means that they synchronize time from the domain hierarchy. However, if a computer has been manually configured to synchronize from a specific time source, perhaps because it was formerly not joined to a domain, you can reconfigure the computer to begin automatically sourcing its time from the domain hierarchy. This article covers the different tools and settings used to manage the Windows Time service.īy default, a computer that is joined to a domain synchronizes time through a domain hierarchy of time sources. The Windows Time service (W32Time) synchronizes the date and time for all computers managed by Active Directory Domain Services (AD DS). Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows 10, Azure Stack HCI, versions 21H2 and 20H2

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