I use the EXIT MV45AFZZ Form USEREXIT_SAVE_DOCUMENT_PREPARE to check some inputted data. If the inputted data are wrong, e.g. Salesoffice, the User need a possibility to change the data again. I send a POPUP to inform the user that the salesoffice not equal the sales office in the customer master data.
How is it possible that the User can change e.g. the salesoffice?