Do one of the following:
Make the task recur at regular intervals
Select options for that frequency. Do not click Regenerate new task, or the task will not recur at regular intervals.
Make the task recur based on completion date
Click Regenerate new task, and then type a time frequency in the box.
Create a task from an existing task
Note Changing the view for items can make selecting specific items easier. For instance, if you want to select all messages that have the same subject, in the folder containing the messages, on the View menu, point to Arrange By, point to Current View, and then click Subject. Select the messages you want from the view.