Hi Delehaye,
Thank you for your inquire.

- Is it possible to synchronize several calendars to one employee?

Unfortunately this is not possible at the moment, only 1 calendar can be assigned to the employee.

As for other question:

You can use CSS to hide the Employees in the booking form, and the plugin will chose randomly the employee and display his/her time slots for the selected service.

HI

Sure,

Here is the CSS code

.el-form-item.am-select-employee-option{
display: none;
}

and the result should be like this (attachment)

Hi Delehaye,

You are welcome.

Have a great weekend!