You can edit any message posted in any of the topics created in a conference. Any group user can edit a message.
To edit 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 edit 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 edit button. The Edit Message box appears.
Edit the message and click the Post Message button to post the modified message.