I am wondering any difference between email archive and email journal? Thanks

The Microsoft definitions: http://technet.microsoft.com/en-us/library/aa998649.aspx Journaling is the ability to record all communications, including e-mail communications, in an organization for use in the organization's e-mail retention or archival strategy. To meet an increasing number of regulatory and compliance requirements, many organizations must maintain records of communications that occur when employees perform daily business tasks. Archiving refers to backing up the data, removing it from its native environment, and storing it elsewhere, therefore reducing the strain of data storage. You may use Exchange journaling as a tool in your e-mail retention or archival strategy.