The POS sends a query to the web service requesting the stock level of the selected item and variant. The web service returns the stock level for the item in each location as well as the number on the purchase order. This query is usually made via the Inventory button on the POS's Item Lookup window.
This function depends on a few variables that need to be configured in the remote database:
The POS Inventory Lookup must be enabled for the stores that should be included in the lookup.
The Product Group must have the POS Inventory Lookup flag set in order to include the items in the group in the lookup.
These parameters allow the system to limit inventory lookup to certain stores and product groups. Once these parameters have been set, the Update Store Inventory Lookup function must be run from the Store card. This populates the lookup table that the web service uses to calculate the stock levels for the selected items and stores.
Error handling
If the POS is unable to contact the remote database, it uses the results from the last query stored in the local database.