W32tm /?

W32tm command line help

W32tm /register

Registers the time service to run as a service and adds default configuration to the registry.

W32tm /unregister

Unregisters the time service and removes all configuration information from the registry.

w32tm /monitor

[/domain:<domain name>] [/computers:<name>[,<name>[,<name>...]]] [/threads:<num>]

domain – specifies which domain to monitor. If no domain name is given, or neither the domain nor computers option is specified, the default domain is used. This option might be used more than once.

computers – monitors the given list of computers. Computer names are separated by commas, with no spaces. If a name is prefixed with a ‘*’, it is treated as a PDC. This option might be used more than once.

threads – specifies the number of computers to analyze simultaneously. The default value is 3. Allowed range is 1-50.

w32tm /ntte <NT time epoch>

Convert an NT system time, in (10^-7)s intervals from 0h 1-Jan 1601, into a readable format.

w32tm /ntpte <NTP time epoch>

Convert an NTP time, in (2^-32)s intervals from 0h 1-Jan 1900, into a readable format.

w32tm /resync

[/computer:<computer>]

[/nowait]

[/rediscover]

[/soft]

Tells a computer that it should resynchronize its clock as soon as possible, throwing out all accumulated error statistics.

computer:<computer> – Specifies the computer that should resynchronize. If not specified, the local computer will resynchronize.

nowait – do not wait for the resynchronize to occur; return immediately. Otherwise, wait for the resynchronize to complete before returning.

rediscover – Redetect the network configuration and rediscover network sources, then resynchronize.

soft – resynchronize using existing error statistics. Not useful, provided for compatibility.

w32tm /stripchart

/computer:<target>

[/period:<refresh>]

[/dataonly]

[/samples:<count>]

Display a strip chart of the offset between this computer and another computer.

computer:<target> – the computer to measure the offset against.

period:<refresh> – the time between samples, in seconds. The default is 2s.

dataonly – display only the data without graphics.

samples:<count> – collect <count> samples, then stop. If not specified, samples will be collected until Ctrl+C is pressed.

w32tm /config

[/computer:<target>]

[/update]

[/manualpeerlist:<peers>]

[/syncfromflags:<source>]

[/LocalClockDispersion:<seconds>]

[/reliable:(YES|NO)]

[/largephaseoffset:<milliseconds>]

computer:<target> – adjusts the configuration of <target>. If not specified, the default is the local computer.

update – notifies the time service that the configuration has changed, causing the changes to take effect.

manualpeerlist:<peers> – sets the manual peer list to <peers>, which is a space-delimited list of DNS and/or IP addresses. When specifying multiple peers, this option must be enclosed in quotes.

syncfromflags:<source> – sets what sources the NTP client should synchronize from. <source> should be a comma separated list of these keywords (not case sensitive):

MANUAL – include peers from the manual peer list.

DOMHIER – synchronize from a domain controller (DC) in the domain hierarchy.

LocalClockDispersion:<seconds> – configures the accuracy of the internal clock that W32Time will assume when it can’t acquire time from its configured sources.

reliable:(YES|NO) – set whether this computer is a reliable time source.

This setting is only meaningful on domain controllers.

YES – this computer is a reliable time service.

NO – this computer is not a reliable time service.

largephaseoffset:<milliseconds> – sets the time difference between local and network time which W32Time will consider a spike.

w32tm /tz

Display the current time zone settings.

w32tm /dumpreg

[/subkey:<key>]

[/computer:<target>]

Display the values associated with a given registry key.

The default key is HKLM\System\CurrentControlSet\Services\W32Time

(the root key for the time service).

subkey:<key> – displays the values associated with subkey <key> of the default key.

computer:<target> – queries registry settings for computer <target>

w32tm /query [/computer:<target>] {/source | /configuration | /peers | /status} [/verbose]

This parameter was first made available in the Windows Time client versions of Windows Vista, and Windows Server 2008.

Display a computer's Windows Time service information.

computer:<target> – Query the information of <target>. If not specified, the default value is the local computer.

Source – Display the time source.

Configuration – Display the configuration of run time and where the setting comes from. In verbose mode, display the undefined or unused setting too.

peers – Display a list of peers and their status.

status – Display Windows Time service status.

verbose – Set the verbose mode to display more information.

w32tm /debug {/disable | {/enable /file:<name> /size:<bytes> /entries:<value> [/truncate]}}

This parameter was first made available in the Windows Time client versions of Windows Vista, and Windows Server 2008.

Enable or disable the local computer Windows Time service private log.

disable – Disable the private log.

enable – Enable the private log.

• file:<name> – Specify the absolute file name.
• size:<bytes> – Specify the maximum size for circular logging.
• entries:<value> – Contains a list of flags, specified by number and separated by commas, that specify the types of information that should be logged. Valid numbers are 0 to 300. A range of numbers is valid, in addition to single numbers, such as 0-100,103,106. Value 0-300 is for logging all information.

truncate – Truncate the file if it exists.