How do I share Outlook folders?

 To share a folder in Outlook:

• Right-click the folder that will be shared.
• Select "Properties".
• Select the "Permissions" tab.
• Click "Add", and select the user(s) the folder will be shared with.
• Select the required permission levels for each user added. 
• Click "OK".

Ask the user(s) to open the shared folder:

• Launch Outlook.
• Select the "File" menu.
• Select "Open", and "Other User's Folder".
• Click "Name...", and select the user who shared the folder. Select the relevant "Folder type" from the drop-down menu.
• Click "OK".