Here we would like to draw your attention to SU12 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).SU12 is a transaction code used for Mass Changes to User Master Records in SAP.
It comes under the package SUSR.
Transaction SU12 technical data table
|Purpose||Mass Changes to User Master Records|