Well, the usual questions that apply when discussing FTP:
1 - Are there any programs shown in WRKREGINF EXITPNT(QIBM_QTMF_*), 8=Work
with exit programs
There might be a "security exit point program" in place that has some
unique conditions that only affect this person. I've written some from
scratch - it's possible.
2 - Anything interesting in iNav's area that also does roughly the same
thing? If you need help hunting down the area of iNav that handles this,
let me know.