Environment
Novell ZENworks 10 Configuration Management with Support Pack 2 - 10.2 Inventory
Dell OptiPlex 320, 745, 755, 760
Dell Latitudes D810, E5500, E6500
Situation
Serial numbers are blank in ZCM inventory reports for Dell Machines
Resolution
This is fixed in version 10.3.1 - see KB 7006265 "ZENworks Configuration Management 10.3.1 - update information and list of fixes" which can be found at Novell Support