Check for Updates / SCCM

Hi all,
we are using SCCM 2007, SUP is installed and working fine. :-)
When I go to Windows Update on an SCCM client and "Check for updates" it tells me, that the client is up to date, but it is not. "Check for updates online using Microsoft Web Site" shows a lot of missing updates as well as the SCCM Software Update Scan.
So far I know, "Check for updates" checks against SCCM or WSUS. Can anybody tell me, what exactly happens in detail and why the check says that the client is up to date, when it is not?
 
Thanks in advance!

When it is checking against SCCM or WSUS and says that it is "up to date", it means that it has all of the updates the the corporate Administrator has published to the workstation.  When you check Microsoft Update, it is showing you all the updates, not just the ones that have been deployed by your administrator.
 
You should contact the person who manages updates at your organization to find out what there policy/procedure is for deploying updates.
 
I hope that helps.
 
Nash

Hi Nash,
 
thanks for your answer.
Could you please explain, what it means exactly in SCCM context, when you say "all of the updates the corporate Administrator has published to the workstation"?
 
Thanks a lot!

He means that the updates the person who manages keeping the machines up to date has "approved". WSUS/SUP gets it's update list and then it is up to the administrator to test and then approve whether or not a client can get that update. If it is approved, the update is considered published and the client will then pull this new policy and update accordingly.