I am trying to understand how the backup tech works, and I have a couple of questions.

1. Does the backup tech get assigned when someone manually assigns a request to a tech who will not be available on the request's dueByDate, provided the bakcup tech is set for the day?  Or is the request assigned to the backup tech only when the system assigns it automatically using some features like Business Rules, Technician Auto Assign?

2. When does the request assignment to the backup tech actually take place if the dueByDate is not the day of creating the request?  Upon creating/assigning the request or at 0am on the dueByDate?

We are on SDP build 8217.

Thank you.