Have multiple Endevor implementations and use the ENUXSITE exit to control the different C1DEFLTS that get used.
This user looks at the Environment information in Foreground and they are accessing the correct C1DEFLTS. However, when they run a batch Add, it is using the wrong C1DEFLTS.
The user's ID needed to be added to the ENUXSITE exit to load the correct C1DEFLTS table --
CLC NDVRUSER(3),=CL6'USRXYZ1' USER XYZ1 ENDEVOR ADM
BE LDC1XXX
See Exits Reference for more information on ENUXSITE