Item defaults to a specific Location upon Sales Order Entry Even if there is no Preferred Location Set in either the Item Record or in Accounting Preferences

Answer:

There is a designated location in the main line Location field of the item record form.  You have (2) options to prevent setting of a default Location when a Sales Order is entered:

Option I:
1. Navigate to Lists > Accounting > Items.
2. Edit the Inventory Item.
3. Change the Custom Inventory Part Form to Standard Inventory Part Form.
4. Location field will now be displayed in the main field.
5. Remove the Location in the main field of the Item Record.
6. Hit Save.

If the Item record form is customized and the main line Location field is set as Hidden; customize the form used in the Item Record:

Option II:
1. Navigate to Lists > Accounting > Items.
2. Edit the Inventory Item.
3. Click Customize > Customize Form.
4. Navigate to Fields > Location.
5. Check the show box for Location.
6. Hit Save.
7. Navigate back to the Item Record.
8. Remove the Location in the main field of the Item Record.
9. Hit Save.