Errors show up in the log file about Invalid columns and the Date and Time stamp are not shown in Resource Manager for the affected dataclasses from Inventory.
Invalid column [<column>] value [<Date>] (fixed [[NULL()]]) for resource <GUID>: 'SW Patch Windows' (<GUID>)
The date and time stamp are in a different format from the Notification Server and cannot be processed. Such as Day/Month/Year vs Month/Day/Year.
This problem is resolved in Inventory Solution 7.5 SP1 Hotfix 5.
Inventory Solution for 7.5