Multi-Select Picklist populated from external data

[Stefan]

Using DBAmp to load SAP data into a Multi-Select Picklist on Account record.

A SQL Server job works through the data and loads multiple products into this product field for each account.

Trying to work out a way to capture when a new product has been used in SAP. The data loads OK but the new Product is not available for filtering because it has not been added as a picklist item.

Any ideas?