Windows time configuration

You must use a third party time service that will support this requirement. Windows Time Service Tools and Settings Includes specific w32tm command switches and registry entries.

This posting is provided AS-IS with no warranties or guarantees and confers no rights. You must be logged in to post a comment. Note: In some cases you must wait a little time for the service to instantiate.

NtpServer: time. Good example: dc Good example result showing the DC02 is syncing with dc Do not perform on any other DC in any domain in the forest. The default value for stand-alone clients and servers is , Note Zero is not a valid value for the UpdateInterval registry entry.

The default value on stand-alone clients and servers is 1. The default value on stand-alone clients and servers is 0x1. The NtpServer is a time server that responds to client time requests on the network by returning time samples that are useful for synchronizing the local clock.

LargeSampleSkew All versions Specifies the large sample skew for logging, in seconds. Events will be logged for this setting only when EventLogFlags is explicitly configured for 0x2 large sample skew. The default value on domain members is 3. The default value on stand-alone clients and servers is 3. ResolvePeerBackOffMaxTimes All versions Specifies the maximum number of times to double the wait interval when repeated attempts to locate a peer to synchronize with fail.

A value of zero means that the wait interval is always the minimum. The default value on domain members is 7. ResolvePeerBackoffMinutes All versions Specifies the initial interval to wait, in minutes, before attempting to locate a peer to synchronize with. SpecialPollInterval All versions Specifies the special poll interval, in seconds, for manual peers.

When the SpecialInterval 0x1 flag is enabled, W32Time uses this poll interval instead of a poll interval determined by the operating system. The default value on domain members is 3, The default value on stand-alone clients and servers is , It contains reserved data that is used by the Windows operating system. It specifies the time, in seconds, before W32Time will resynchronize after the computer has restarted.

Any changes to this setting can cause unpredictable results. The default value on both domain members and on stand-alone clients and servers is left blank. The following registry entries are not a part of the W32Time default configuration but can be added to the registry to obtain enhanced logging capabilities. By default, the Windows Time service logs an event every time that it switches to a new time source. These are the global Group Policy settings and default values for the Windows Time service.

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Any additional feedback? Caution Don't use the Net time command to configure or set a computer's clock time when the Windows Time service is running. Note If you have a computer with multiple network adapters is multi-homed , you cannot enable the Windows Time service based on a network adapter. Important Windows Server has improved the time synchronization algorithms to align with RFC specifications. Note In this case, if you want to set the clock back slowly, you would also have to adjust the values of PhaseCorrectRate or UpdateInterval in the registry to make sure that the equation result is TRUE.

Note When you remove a Group Policy setting, Windows removes the corresponding entry from the policy area of the registry. Warning This information is provided as a reference for use in troubleshooting and validation.

Note Some of the parameters in the registry are measured in clock ticks and some are measured in seconds. Ticks Property. Submit and view feedback for This product This page. View all page feedback.

In this article. Registers the Windows Time service to run as a service and adds its default configuration information to the registry.

Unregisters the Windows Time service and removes all of its configuration information from the registry. Monitors the Windows Time service. Converts a Windows NT system time measured in 10 -7 -second intervals starting from 0h 1-Jan into a readable format.

Converts an NTP time measured in 2 -second intervals starting from 0h 1-Jan into a readable format. Tells a computer that it should resynchronize its clock as soon as possible, throwing out all accumulated error statistics.

Displays a strip chart of the offset between this computer and another computer. Displays the values associated with a given registry key. Displays the computer's Windows Time service information.

Enables or disables the local computer Windows Time service private log. Controls whether this computer is marked as a reliable time server. A computer is not marked as reliable unless it is also marked as a time server.

Not a time server 0x Always time server 0x Automatic time server 0x Always-reliable time server 0x Automatic reliable time server The default value for domain members is Controls whether or not the chaining mechanism is disabled. If chaining is disabled set to 0 , a read-only domain controller RODC can synchronize with any domain controller, but hosts that do not have their passwords cached on the RODC will not be able to synchronize with the RODC.

Specifies the maximum amount of time that an entry can remain in the chaining table before the entry is considered to be expired. Expired entries may be removed when the next request or response is processed. The default value is 16 seconds. Controls the frequency at which an event that indicates the number of successful and unsuccessful chaining attempts is logged to the System log in Event Viewer.

The default is 30 minutes. Controls the maximum number of entries that are allowed in the chaining table. If the chaining table is full and no expired entries can be removed, any incoming requests are discarded.

The default value is entries. Controls the maximum number of entries that are allowed in the chaining table for a particular host. The default value is 4 entries. Specifies the smallest local clock adjustments that may be logged to the W32time service event log on the target computer. The default value is parts per million - PPM. Indicates the maximum number of seconds a system clock can nominally hold its accuracy without synchronizing with a time source. If this period of time passes without W32time obtaining new samples from any of its input providers, W32time initiates a rediscovery of time sources.

Default: 7, seconds. Controls which events that the time service logs. Time jump 0x2. Source change The default value on domain members is 2.

The default value on stand-alone clients and servers is 2. Controls the rate at which the clock is corrected. If this value is too small, the clock is unstable and overcorrects. If the value is too large, the clock takes a long time to synchronize. The default value on domain members is 4. NtpServer: time. Good example: dc Good example result showing the DC02 is syncing with dc Windows and all newer: Open an Administrator Command Prompt.

Note that the examples below use either time. Windows Generally speaking, the w32tm command is similar to Windows and newer operating systems. There are also some differences between Windows RTM and various service packs. Their results are displayed on the screen. First check and document the current configuration: See Section 3 above. On the DC that you're experiencing issues with, run the following: Open an Administrator command prompt. It does not apply to R2 or newer and will be ignored if you try it.

This command tells the client whether a DC or workstation to delete the current registry settings for time and use default settings.