Both the low energy spectral sensitivity of the LECS
(Low-Energy Concentrator Spectrometer)
and the broad band coverage of the other instruments on board the BeppoSAX
satellite allow the soft X-ray spectra of AGN to be studied in
unprecedented detail down to 0.1 keV.
We report on observations of low-energy features in the spectra of both low (Seyfert 1) and high luminosity AGN (blazar). These features provide important diagnostics on the nature of AGN. We compare our results with the predictions of models for these low-energy features, contrasting the low and high luminosity cases.