An Exchange public folder can provide shared access to several people using Outlook Web App –  Web App for Exchange 2013, Outlook 2007, Outlook 2010, Outlook 2013, and Outlook for Mac.. It allows a group of users to view and send e-mails from a common mailbox. These users can also share common calendar. Users can store, organize and manage information among themselves.

1. Log into your Office 365 account with Admin privileges. Click on “Admin” and select “Exchange”.
2. From the “Exchange admin center”, click on “Public folder” in the left.
3. The resultant dialog box has 2 options -“public folders” and “public folder mailboxes”. Select “public folder mailboxes” to add the mailbox.
4. Press the “+” icon.
5. In the “new public folder mailbox” dialog box, enter the name for the public folder and click on “Save”.
6. In “Exchange admin center” -> “public folder”, you will now see the newly created mailbox in the list of public folder mailboxes. Select “public folders” in the top navigation.
7. Click the plus sign and enter a name for the public folder. This is the name that will be visible in Outlook. You don’t have to enter anything in the Path field. Click on save button.
8. Now you will see the new public folder in the list.
9. Now, Enable the mail settings by clicking the “Enable” from the lists in the right pane. Warning dialog box appear on the display screen. Click “Yes” button to confirm.
10. You can view “My Public Folder” enable in your desktop screen. Click on “Outlook” for opening Outlook 365.
11. When Office outlook 365 window appears on your screen, right click on Favorites and select add public folder.
12. Choose the folder you want to add. Then click add.
13. Your Public folder is added. Now you can forward emails to your public folder.