Store selection is grayed out on Customer-Specific Purchases / Purchase Requests

Summary:

Option to lookup Stores is grayed out on Customer-Specific Purchases screen (Purchase Requests)

Cause:

Setup issue / Security restriction. 

Solution:

Enable Allow other stores on the user’s system security code (Setup / System / Security Code in use for the CPSQL User ID), and Access other stores’ orders in Setup / Point of Sale / Stores / Orders.