I have add a connection/ relation from Task and Appointment to Schedule board -> going to Resource Scheduling -> Administration ->Enable Resource Scheduling for Entities. After that, Book icon show on Task and Appointment ribbon. I can do Scheduled a new record, but even if I try to hard book this entry doesn't show in Bookings and Tasks.

The question is "How I can copy my Task or Appointment from activities to PSA Scheduled Board?" The reason why I try to do that is to user have one place to check his "to do".