SAP ABAP Program RSUSR300 (Set External Security Name for All Users) is using

• Table/Structure Field (10)
• Function Module (3)
• Message Class (2)
• Message Number (2)
• Program (3)
• Table (4)

#	Object Type	Object Name	Object Description	Note
1	Message Class	01	General Basis, e.g. user and authorization maintenance
2	Message Class	S#	Messages for SU22 and the Profile Generator