How do I delete a forum post (i.e. conversation)?
Go to Forums.
Select the Forums tool from Tool Menu in your site.
Choose a topic within a forum.
Select the title of the topic to enter the topic.
Select a conversation from list.
Select the title of the conversation.
Select delete message.
Select Delete Message for the message you want to remove.
Select Delete Message again to confirm.
If you are sure you want to delete the message, select Delete Message to confirm removal. The message will be permanently deleted.