  Models of magnetically driven accretion reproduce many observational
properties of T Tauri stars. For the more massive Herbig Ae/Be stars, the
corresponding picture has been questioned lately, in part driven by the fact
that their magnetic fields are typically one order of magnitude weaker. Indeed,
the search for magnetic fields in Herbig Ae/Be stars has been quite time
consuming, with a detection rate of about 7%, also limited by the current
potential to detect weak magnetic fields. Over the last two decades, magnetic
fields were found in about twenty objects and for only two Herbig Ae/Be stars
was the magnetic field geometry constrained. Further, studies were undertaken
to investigate the time dependence of spectroscopic tracers of magnetospheric
accretion. Overall, it seems that while there is proof that magneospheric
accretion is present in some Herbig Ae stars, there is less evidence for the
Herbig Be stars.
