Use

For each message type you create, you must specify the purpose for which it is to be used. For example, outputting (printing/transmission) of new documents, outputting of change documents, outputting of urging messages (expediters).

Activities

You make the settings for fine-tuned control with regard to the various message types in Customizing for Purchasing .

If you wish to use different message types for each type of scheduling agreement release, you should specify which message type updates the print-relevant data (e.g. date of last transmission).