FSM allows to assign more than one technician to a Person Reservation. A Person Reservation created for multiple persons in FSM results in multiple time documents in SAP ECC/S4 (CATS or confirmations separate for each person).
In case of update or deletion of such a person reservation in SAP ECC/S4, the initial reservation object in FSM is deleted and updated/remaining reservations are sent to FSM as separate objects (separate for each technician).