Well, let's look at the posibilities. She was not on the Jedi Council a few years after KotOR.
- She quit being a Jedi.
- She was killed
- She died of old age (Seems a bit early)
- She remained a Jedi and kept unorthodox. This prevents her from joining the Council on Coruscant.
- She, for some reason, didn't become good enough for the Council