Business requirement I had a chance to enhance GOS email service from my suggestion to utilize already activated GOS functionality instead of building new object. GOS has been activated at lots of SAP transactions in my system but only specific Tcode needs to be enhanced. The enhancement point of the requirement was “Send” email -> “Send Object with Note” at VIM DP document transaction. Searching the node of GOS at SGOSATTR. SO_SENDOBJ is a sub node of SO_SENDSERV. So need to replace the ABAP class CL_GOS_SRV_SEND_OBJECT with a custom class Assign a custom class in Table SGOSCUST Create a custom class inherited from the standard class CL_GOS_SRV_SEND_OBJECT or from the super class CL_GOS_SERVICE of CL_GOS_SRV_SEND_OBJECT. Redefine Method ‘EXECUTE’ of CL_GOS_SERVICE at newly created customer class which is assigned to above img table. In my case, I choose the BOR object with a global variable gs_lporb–typeid . Example : “BUS2012” Purchase Order gs_lporb has field INSTID -> Document number, TYPEID -> BOR name, CATID -> BO “BO” indicator. So only specific BOR will call my enhancement otherwise call Standard logics super->execute( ) . Build custom logics Custom default subject & message, “Confidential Clause” are added as part of enhancement for my case. ** DATA: lt_text TYPE soli_tab, lp_subject TYPE so_obj_des, lp_line TYPE soli, lp_oid TYPE os_guid, ls_object TYPE borident, lp_mess(80) TYPE c, lp_errmess TYPE string. TRY. * Set object info for link ls_object-objtype = gs_lporb-typeid. ls_object-objkey = gs_lporb-instid. * Set mail subject lp_subject = TEXT-101 && gp_def_attrib. * Add confidential Clause DO 6 TIMES. APPEND INITIAL LINE TO lt_text. ENDDO. APPEND 'CONFIDENTIAL CLAUSE' TO lt_text. DATA(lv_cc) = cl_wd_utilities=>get_otr_text_by_alias( zif_vim_email_service~gc_confidential_clause ). lt_text = CORRESPONDING #( BASE ( lt_text ) cl_bcs_convert=>string_to_soli( lv_cc ) ). * Customer enhancement for VIM lp_oid = me->send_obj( EXPORTING is_object = ls_object ip_subject = lp_subject it_note = lt_text ip_link = 'X' ). lp_errmess = lp_mess. MESSAGE lp_errmess TYPE 'S'. IF lp_oid IS INITIAL. RAISE execution_failed. ELSE. MESSAGE s051(sgos_msg). RAISE EVENT service_succeeded EXPORTING eo_service = me. ENDIF. CATCH cx_bcs. RAISE execution_failed. ENDTRY. Unit Test Default subject, pre-defined message and default recipients populated by the enhancement and invoice document is being attached as PDF file which is not supported by SAP standard Extensibility You can add custom functions with SAP standard GOS (Generic Object Service)s features like adding notes, workflow tasks, and sending emails using this simple enhancement. For instance, posting Twitter articles or social media massages, read/write documents from external servers, API call from external service providers, and etc.