Enterprise Server Default Users and Associated Environment Variables

Enterprise Server has a set of default users that are used when no user is logged on for CICS, JES, IMS or ESMAC authentication. These users and the associated environment variables are:
Environment User Associated Environment Variable
ESMAC mfuser ES_USR_DFLT_ESMAC
CICS CICSUSER ES_USR_DFLT_CICS
JES JESUSER ES_USR_DFLT_JES
IMS IMSUSER ES_USR_DFLT_IMS

Using the environment variables, the default users can be overwritten by the users of your choice. For instance we could overwrite the ESMAC default user using in the region configuration.

configuration:
[ES-Environment]
ES_USR_DFLT_ESMAC=ESMACUSR