In eDiscovery - applying filters to the review set

Microsoft Purview eDiscovery (Standard and Premium) does not allow you to directly filter Review Set items based on their original folder location (like Inbox, Sent Items, or Deleted Items) as it appeared at the time of collection. Once content is ingested into a Review Set, messages are flattened and indexed for search, meaning that the folder path information is preserved as metadata but not exposed as a standard filter in the Review Set interface.

However, you can still locate items by folder indirectly. When performing the collection search (before adding items to the Review Set), you can include folder-level conditions in the KQL query or search conditions using properties such as folderid, folderpath, or messagekind. For instance, you could target only the Inbox by using a query like "folderpath:Inbox" or deleted items with "folderpath:DeletedItems". After items are added to the Review Set, you can view the folder metadata in the Metadata view or export the Review Set to CSV to analyze the ParentFolder or FolderPath fields externally. Please hit like if you like the solution.