This article explains how to share a folder with other users in Microsoft Exchange 2013. This allows other Microsoft Exchange 2013 users to access the data in your Microsoft Exchange account.
Open Microsoft Outlook.
Right-click on the desired folder in the left navigation bar.
Click on Properties.
To grant access rights to additional users, click Add on the Permissions tab.
Select a user and click on Add. Complete the process with OK.
Now you can specify in the Permissions section which rights the selected user should have. Click on the desired user and select a permission level (owner, editor, etc.) or assign the rights individually.
To save the settings, click OK.