  We present results from a joint Xmm-Newton/NuSTAR monitoring of the Seyfert 1
NGC 4593, consisting of 5x20 ks simultaneous observations spaced by two days,
performed in January 2015. The source is variable, both in flux and spectral
shape, on time-scales down to a few ks and with a clear softer-when-brighter
behaviour. In agreement with past observations, we find the presence of a warm
absorber well described by a two-phase ionized outflow. The source exhibits a
cold, narrow and constant Fe K alpha line at 6.4 keV, and a broad component is
also detected. The broad-band (0.3-79 keV) spectrum is well described by a
primary power law with Gamma=1.6-1.8 and an exponential cut-off varying from
90(+40,-20) keV to >700 keV, two distinct reflection components, and a variable
soft excess correlated with the primary power law. This campaign shows that
probing the variability of Seyfert 1 galaxies on different time-scales is of
prime importance to investigate the high-energy emission of AGNs.
