Hello Martin,

Thank you for reaching out to us.

Each employee needs to be assigned to a default location:

However, when you access the Work Hours tab of the employee, you can assign all your locations to your employee's work hours, or you can freely select multiple locations depending on the day:

This way, your employee will be assigned to all locations you've created, but when a customer books an appointment on one of these locations, all other locations will be blocked during this time.

I hope this helps!