Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Important
The classic eDiscovery experiences were retired on August 31, 2025. This retirement includes classic Content Search, classic eDiscovery (Standard), and classic eDiscovery (Premium). These options aren't available as an experience option in the Microsoft Purview portal.
Unless you're working directly with Microsoft when using these legacy features for specific short-term transition scenarios, use the guidance for the new eDiscovery experience in the Microsoft Purview portal.
Processing is the process of file identification, expansion of embedded documents and attachments, text extraction, and Optical Character Recognition (OCR) of image files and the subsequent indexing of that content.
When you add custodians and non-custodian data sources to a case on the Sources tab, all partially indexed items from Microsoft 365 are processed to make them fully searchable. Likewise, when content is added to a review set from both Microsoft 365 and non-Microsoft 365 data sources, this content is also processed.
The Processing tab in eDiscovery (Premium) provides insight into the status of Advanced indexing for different processing scenarios.
For more information, see the following articles: