SAP Function RSEC_GET_USREXTID -

Parameter Reference Type Length Default Optional Text
EXTID C C 0 Extern.ID
IDTYPE USREXTID-TYPE C 2 'ID' X External ID Type
MANDT SYST-MANDT C 3 Client

Parameter Reference Type Length Text
BNAME USREXTID-BNAME C 12 User

Exception Text
INTERNAL_ERROR Internal Error
NOT_FOUND No Entry Found
NOT_VALID Entry is Invalid