The process of configuring SMTP journaling uses both the Commvault software and the Exchange server.
Before You Begin
You must have a thorough understanding of journaling and of defining journal rules on the Exchange server. Consult the Microsoft documentation before you install and configure the ContentStore Mailbox. For example, see the article on the Microsoft TechNet site that corresponds with your version of Exchange.
Exchange 2013: "Journaling", https://technet.microsoft.com/en-us/library/aa998649(v=exchg.150).aspx
Exchange 2010: "Managing Journaling", https://technet.microsoft.com/en-us/library/dd298119(v=exchg.141).aspx
Exchange 2007: "Managing Transport Policy and Compliance Features", https://technet.microsoft.com/en-us/library/aa997635(v=exchg.80).aspx