Force a Wsus client to check for updates

Question

Hi, we have a Wsus server and a GPO that forces all PCs and Servers to work with it.
in the GPO, "configure automatic updates"  is configured to "notify for download and notify for install"
and the "schedule install day" is tuesday.
my question is, how do i make a certain cleint, download the updates (manually by command or something like that)
and not wait for the scheduled time to come..
Thanks
Gil

Answer 1

actually - our workstations are configured to "download and install" on a specific time.
and our servers are configured to "notify..."
so as i understand,  wuauclt /detectnow  is relavant for our workstations (to detect updates earlier than scheduled) but not to our servers - which are constantly updating on new updates given the "notify.." configuration. right?
(btw, how often do they check updates to be notified via the Wsus server?
The wuauclt /detectnow option initiates a detection on all systems, the behavioral differences are a function of the setting of the
Configure Automatic Updates policy.
If AUOption='4' (as you have for your workstations), the command will detect available updates, automatically queue updates for download via BITS, and automatically schedule those updates for installation at the configured time when the download has been
successfully completed.
If AUOption='3' (Notify for Install), the command will detect available updates, automatically queue updates for download via BITS, and then (on WinXP/2003) present a notification to any logged on Administrator inviting them to install the updates or
(on Vista and later) present and enable the Install Updates button in the Control Panel WUApp for any user who is not restricted from installing updates.
If AUOption='2' (Notify for Download), the command will detect available updates and (on WinXP/2003) present a notification to any logged on Administrator inviting them to download the updates or (on Vista and later) --- Hmm... actually, I've never personally
see the WUApp on a machine configured with AUOption-'2'! --- but my expectation would be that the WUApp presents a "Download Now" button, rather than an "Install Now" button.
By default, the WUAgent executes a detection 17.6-22.0 hours after the completion of the previous regular detection event. Using
wuauclt /detectnow causes the previously scheduled detection to be 'rescheduled' 17.6-22.0 hours after the completion of the on-demand event. The detection interval can be configured in policy to a shorter interval, but should be matched (logically)
with your server synchronization event, and your approval processes. If your server is set to synchronize once-per-day, and your approval process is not a daily occurrence, there is NO value in setting the interval to a shorter value. If your server is
set to synchronize more than once per day and you approve updates on a daily basis, there may be value in setting the detection interval to a shorter period, consistent with the server synchronization interval.
Lawrence Garvin, M.S., MCITP:EA, MCDBA, MCSA
Principal/CTO, Onsite Technology Solutions, Houston, Texas
Microsoft MVP - Software Distribution (2005-2012)
My MVP Profile: http://mvp.support.microsoft.com/profile/Lawrence.Garvin