You can reply to any message posted in any of the topics created in a conference. Any group user can reply to a message.
To reply to a message, follow these steps:
Click the Groups tab on the left navigation bar.
Click the Group Memberships icon. The Active Memberships page appears.
Select the group in which you would like to reply to a message. The Group homepage appears.
To scroll down, click the arrow button. Click the Forum button. The Forum page appears.
Select the topic you want to post a message on. The topic appears.
Click the Reply button. The Post Reply box appears.
Create your reply and click the Post Message button to post the message.