Make Compulsory / Required

Hi @pandachan48   As suggested by @markusray17 It requires a small piece of customization.

Please find the code below.

// Sales Orders screen Customization 


public class SOOrderEntryExt : PXGraphExtension<SOOrderEntry>
    {
        #region SalesPersonID
        [PXMergeAttributes(Method = MergeMethod.Append)]
        [PXRemoveBaseAttribute(typeof(PXDefaultAttribute))]
        [PXDefault(typeof(SOOrder.salesPersonID), PersistingCheck = PXPersistingCheck.NullOrBlank)]
        protected virtual void SOLine_SalesPersonID_CacheAttached(PXCache cache)
        {
        }
        #endregion 
    }

// Customers screen Customization

    public class CustomerMaintExt : PXGraphExtension<CustomerMaint>
    {
        public delegate void PersistDelegate();
        [PXOverride]
        public void Persist(PersistDelegate del)
        {
            if (Base.SalesPersons.Select().FirstTableItems.ToList().Count == 0)
            {
                throw new PXException("Salesperson info not found");
            }
            del();
        }
    }