Outlook: Sharing Folders
In Microsoft Outlook, you can allow others within your Exchange organization to access your mailbox folders, including your calendar (see Sharing Calendars in Outlook). You can use Outlook to share your mailbox folders and to access others' mailbox folders that have been shared with you.
There are (2) two steps involved with sharing folders. The first step, "sharing (done from the account that will be sharing) and the second, "accepting the share", (set up in the account the folders with which the folders are being shared). Both of these steps must be completed in order for sharing to work.
(Step 1) Sharing a Folder in Outlook
First, you need to give the other person access permission to both the mailbox and the specific folder in the mailbox. Assign permissions along the entire path down to the folder you want to share; for example, if you want others to have access to a subfolder in your cabinet, you need to assign permissions to the mailbox (i.e. email@example.com) folder, the cabinet, and the subfolder. To set permissions on folders:
8. Click OK
9. Now that you have given Delegate access to your mailbox, you must repeat steps 2-9 for each of the folder(s) you want the Delegate to have access to (be sure to select the actual folder(s) this time, Step #2, not the mailbox).
(Step 2) Accepting a Shared Folder from another account
Note: Although you can add other users' mailboxes to your Outlook Folder List without having any permissions for their mailboxes, you will not be able to view them unless you have at least Reviewer permission.