To turn ON warnings for duplicate Purchase Order Numbers (PO) in Sales Order entry follow below steps:
1. Logon to WMS as “superuser”
2. Go to Tools > Preferences
3. Open Sales Tab
4. Locate tag “Warn on duplicate purchase order numbers” and tick the box to activate. Once activated system will warn if the Purchase Order Number entered has been used before.
5. Record Preferences.
Note: Some preferences do not take affect until after you close out of your current session.