Here we would like to draw your attention to RSRFCCHK 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).RSRFCCHK is a transaction code used for RFC destinations with logon data in SAP.
It comes under the package SAIS_BCE.
Transaction RSRFCCHK technical data table
|Purpose||RFC destinations with logon data|