A very clever user suggested the idea of automatically recognising Milestones from an import file and assigning them as Key Activities to save teams the time of finding and selecting Key Activities. Great idea that we implemented right away!
So now, when you import your data via XML from P6 or MS Project, Planner will find all your milestones or 0 day activities and create them as Key Activities. Planner will also set the Target Date as the date of the Milestone in your XML file.
Key Activities are a very powerful tool that Planner users to drive critical path analysis within the Pathway overlay and the tracking of Key Date movement on Monitor.