Here we would like to draw your attention to EXTID_ID transaction code in SAP. As we know it is being used in the SAP BC-SEC (Security in Basis) component which is coming under BC module (BASIS).EXTID_ID is a transaction code used for External Identification Type ID in SAP.
It comes under the package SECN.When we execute this transaction code, SAPL0SEC is the normal standard SAP program that is being executed in background.
Transaction EXTID_ID technical data table
|Purpose||External Identification Type ID|