Hello Bertrand,

Apologies for replying late, we had two non-working days due to the holidays.

Unfortunately, this can't be achieved in Amelia with its current built-in features. Two employees can't be connected to one appointment.

The only work-around for this use case would be if you connect these two employees that work together on the same appointments to the same Google calendar so when one of them is booked the time slot for the other one will become unavailable because of the created event in Google calendar. But, in this case the appointments made for one employee will always block that time slot for the other employee. So, this would be useful if they always work together on the appointments. You can read more about Google sync following this link.

If you have any further questions or concerns feel free to ask,