Complete a Project Milestone
When a project milestone event is complete, you must sign it off against the project. Once a milestone event is set to complete, it cannot be edited.
To complete a project milestone:
You can also complete milestones through the Milestones (Events) dashpart in the Personal Zone. To do this, click for the milestone that you want to complete, and then click Complete Milestone on the Event Notification window.
Parent Topic: Manage Project Milestones