Date Converted to Inventory field is shown under System Information subtab of an inventory item record. This is only shown once a non-inventory item is converted to inventory. Currently, this field is not available in saved searches. To create a saved item search to show all non-inventory items which were converted to inventory, follow the detailed steps below:
1. Navigate to Lists > Search > Saved Searches > New > Item.
2. Under Criteria subtab, enter the following:
Type: Inventory Item
System Notes Fields..Type: Change
System Notes Fields..Field: Item Type
3. Under Results subtab, enter the following:
System Notes Fields...Old Value
System Notes Fields...New Value
System Notes Fields...Date
4. Enter a Search Title and hit Save.