In Sales Orders, where do the Sold-To Contact and Ship-To Contact populate from?
Under the 'Header' tab of the Sales Order, there is a 'Contact' sub-tab which contains a 'Sold to Contact' and a 'Ship to Contact'. These default to values that are set up in the (Sales > Customers screen), for the customer chosen.
The Sold to Contact is defaulting from (Sales > Customers > Additional tab > Main Contact Name).
The Ship to Contact is defaulting from (Sales > Customers > Detail tab > Delivery & Billing side-tab > Delivery Addresses top-section > Contact column) for the chosen delivery address.