1. On the correspondence window select the check box next to Confidential. 

Figure: Marking correspondence as confidential

Once you save the correspondence marked as confidential it can be viewed from:

• Draft folder of the sender. 
• If the correspondence is send through a workflow, the correspondence will be available in the workspace of users who are in the active stage of the workflow. 

Correspondence marked as confidential will not be listed in: 

• Document search results. 
• Smart folders.