For those users who work in E-Discovery and are concerned with email related parent/child relationships, the "Find Parent Emails" will aid in the collection process by identifying the parent emails and allowing a user to collect only parent emails as opposed to parent and child.
E-Discovery File Definitions
Parent - A top-level message which contains at least one attachment
Child - An attachment to an email
Loose File - A non-email related file such as a Word document or PDF file. Loose files are normally organized on a file system in a folder structure.