Yes, that should be doable. below text is from FM Datasheet:
"bulk Firmware Upgrades : Ruckus Smart Wi-Fi system firmware can be upgraded individually or in bulk. FlexMaster allows the operator to select a set of
devices, schedule the firmware upgrade, and receive notification
when the upgrade is complete. With a simple click of the mouse,
the operator has the flexibility to perform bulk firmware upgrades
on all of the remaining units in the field, or schedule upgrades for
a specific time"