A little gotcha for Azure DevOps. Let’s say you have a scrum board and want to move all open tasks from the previous sprint to the current sprint. You could open each workitem and change the Iteration field to the current version. The easier way, is to open the Sprint board. Next click the button with the horizontal lines and choose planning.
Next you can drag and drop all outstanding tasks to the Planning Window with the new sprint. The user stories will automatically be moved. Et voilà. Your open issues are moved to the current sprint. In this case sprint 14.