Here we would like to draw your attention to SO40 transaction code in SAP. As we know it is being used in the SAP BC-SRV (Basis Services / Communication Interfaces in Basis) component which is coming under BC module (BASIS).SO40 is a transaction code used for SAPoffice: Cust. Layout Set MAIL in SAP.
It comes under the package SO.When we execute this transaction code, RSSOCUFM is the normal standard SAP program that is being executed in background.
Transaction SO40 technical data table
|Purpose||SAPoffice: Cust. Layout Set MAIL|