Open or select an item in the shared folder.
Click Reply on the toolbar.
Click a reply option.
You can reply to the original discussion topic, rather than to the
item you are reading. Or, you can reply to any item you are reading, whether
it's an original discussion topic or someone else's reply. In both cases,
these replies are posted in the shared folder and not sent to individuals.
If you reply privately to the individual who wrote the item, your reply
is not posted to the shared folder.
Click OK.
Type your reply, then click Post on the toolbar.