CICS default user
CICS® performs a surrogate user security check against its own userid (the CICS region userid) to ensure that it is properly authorized as a surrogate of the default userid specified on the DFLTUSER system initialization parameter.
CICS® performs a surrogate user security check against its own userid (the CICS region userid) to ensure that it is properly authorized as a surrogate of the default userid specified on the DFLTUSER system initialization parameter.