When you create a backup selection list, you can specify the priority for processing the jobs associated with the selection list. In addition, you can set a time range when the resources in the list will be available for backup. The time range is called the availability window. You can set a default availability window for selection lists. When you create a new selection list, the default availability window displays, but you must select the Limit availability to this daily time window option in order for the selection list to use the default window.
See Setting priority and availability windows for selection lists.
You can set one availability window per selection list, and the window is the same for each day of the week. If you merge two or more selection lists or replace a selection list, Backup Exec uses the availability window of the original list.
If you schedule a job to run outside of the availability window, the job does not run and Backup Exec displays an Invalid Schedule status for the job on the Job Monitor. For example, you set the availability window to allow resources to be available for backup between the hours of 11:00 p.m. and 6:00 a.m. If you schedule a backup job to run at 7:00 a.m, the job will not run because the resources are not available at that time. When scheduling a job, be sure that the schedule overlaps the availability window for the resources.