Is there a way to track the modification history for tasks?
If the task is edited multiple times, you can view the modification history by clicking “Modified x times” link in the top right corner. Select the task item in the left pane, in the Task Management portal. In the right pane, in the top right corner, you should see “Modified x times” link. If the task was never modified, then you wont see the “Modified x times” link.