Procedure
1.On the Question Answer page, go to the Discussion section.
2.Click on the View button to view a Discussion item and the replies to it.
3.The Question Summary page would be shown in the Discussion tab as selected. This page will show all the Discussion items and its replies of the selected question.
4.Click the Reply option in the Discussion items to post a reply.
5.Record the reply in the Comment field in the Add Discussion dialog.
6.Click on the Save button to save the reply to the selected Discussion item.