Do one of the following:
Post a reply to the public folder
How?
If the folder you want to open is located within another folder, click the plus sign (+) next to each subfolder until you find the folder you want.
Open the item or file you want to post a reply to.
Reply to the person who posted information in a public folder
How?
If the folder you want to open is located within another folder, click the plus sign (+) next to each subfolder until you find the folder you want.