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Use sprints for manual scheduling AND Prefer sprints over manual start and finish dates are selected:
If an issue is assigned to a sprint, it will be scheduled for the duration of that sprint, even if it has Start/Finish dates available
If an issue is not assigned to a sprint, it will be scheduled based on its Start/Finish dates
If no Start/Finish dates are available, the issue is resolved and Use Resolution Date as the Finish Date is selected, the issue will be scheduled based on its resolution date
Otherwise, the issue will be automatically scheduled
Use sprints for manual scheduling is selected, but Prefer sprints over manual start and finish date is NOT selected:
If a Start or Finish date is available, the issue will be scheduled based on these, even if it is assigned to a sprint
If no Start or Finish date is available, but the issue is assigned to a sprint, the issue will be scheduled for the duration of that sprint
If the issue is not assigned to a sprint, is resolved and Use Resolution Date as the Finish Date is selected, the issue will be scheduled based on its resolution date
Otherwise, the issue will be automatically scheduled
Use sprints for manual scheduling is NOT selected:
If a Start or Finish date is available, the issue will be manually scheduled based on these
If no Start/Finish dates are available, the issue is resolved and Use Resolution Date as the Finish Date is selected, the issue will be scheduled based on its resolution date
Otherwise, the issue will be automatically scheduled