  We report on observations of the extended environment of the bright Be star
$\gamma$-Cas performed using intensity interferometry measurements within its
H$\alpha$ emission line. These observations were performed using a modified
version of the I2C intensity interferometry instrument installed onto the 1.54
meter M\'{e}O optical metrology telescope and a portable 1-meter telescope
(T1M). In order to better constrain the extent of the H$\alpha$ envelope,
observations were performed for two different positions of the T1M telescope,
corresponding to an intermediate and long baselines in which the extended
region was partially and fully resolved. We find that the observed data are
consistent with past interferometric observations of $\gamma$-Cas. These
observations demonstrate the capability to equip optical telescopes of
different optical designs with intensity interferometry capabilities and
illustrate the potential to scale a similar system onto many additional
telescopes.
