Clone Task List from List / Gantt View

1. Navigate to your project and click Tasks in the top band.
   
2. Hover over a task list title and click .
   
3. Click Clone.
   
4. If the tasks in the existing task list have dependency, you will be prompted to make a choice.
   
5. Clone current task list: Clone the current task list without including dependent task lists.
   
6. Clone dependent task lists within the project: Clone current and dependent task lists.
7. Enter No of instances and click Clone.
    

Clone Task List from Milestone Detail page

1. Navigate to your project and click Milestones in the top band.
   
2. Click List or Gantt view from the view drop-down and hover over a milestone.
   
3. Click  to view options and select Clone.