Systems Management Server (SMS) 2003 clients that scan for software updates in the Microsoft Updates catalog will download the latest Microsoft Updates catalog and scan for software updates every 7 days by default. The following procedure provides the steps necessary to manually download the software updates catalog on clients and initiate the inventory scan.
To download the latest Software Updates catalog
In the Configuration Manager console, navigate to System Center Configuration Manager / Site Database / Computer Management / Software Distribution / Advertisements.
Right-click Microsoft Updates Tool, and then click Re-run Advertisement. The client computers in the target collection receive the advertisement, check for an updated version of the Microsoft Updates catalog, and initiate an inventory scan for the software updates.