1. How can I print a progress report from planner? 2. How can I stop other users to change the due date for any task? (just the created by user can change it) 3. How can I can stop other users to do complete for any task? (just the created by user can mark it as complete)
My two cents here: 1. Planer does not provide this feature, so you have to rely on the print features of the browser 2. You cannot, every member of the Plan can change the due date for a task 3. Same as 2.