If the hardware inventory client agent is enabled at a site, the Delete Aged Inventory History task deletes all client hardware inventory history data older than the number of days specified. After this task runs, only the current inventory data is left in the Configuration Manager 2007 site database. Site databases at other sites are not affected.
Defaults Deletes hardware inventory data older than 90 days; runs on Saturday between midnight and 5:00 A.M.