DeduplicateBy

Whether to deduplicate as a family or individual

Name	Summary
Individual	Deduplication by individual treats each item as an individual and an attachment or embedded item has the same priority for deduplication as a loose file.
Family	Items can be treated as a family where only the top-level item of a family is deduplicated and the descendants are classified as original or duplicate with their family as a group. The top-level item does not have to be in the set for its descendants to classified this way.