File types not indexed for searchĬertain types of files, such as Bitmap or MP3 files, don't contain content that can be indexed.
For more information, see Investigating partially indexed items in eDiscovery. You can also specify whether to include partially indexed items when you export search results to a local computer or when you prepare the results for analysis with Advanced eDiscovery. The reason for the difference between volume and size is that larger files have a higher probability of containing content that can't be completely indexed.įor legal investigations, your organization may be required to review partially indexed items. Most organizations have less than 1% of content by volume and less than 12% by size that is partially indexed. Too many files attached to an email message.Ī file attached to an email message is too large.Ī file is encrypted with non-Microsoft technologies. The file type is supported for indexing but an indexing error occurred for a specific file. Messages have an attached file that can't be opened, such as image files this is the most common cause of partially indexed email items. The file type is unrecognized or unsupported for indexing.
Here are some other reasons why items can't be indexed for search and are returned as partially indexed items when you run an eDiscovery search: In Exchange, a partially indexed item typically contains a file (of a file type that can't be indexed) that is attached to an email message. Partially indexed items are Exchange mailbox items and documents on SharePoint and OneDrive for Business sites that for some reason weren't completely indexed for search. An eDiscovery search that you run from the Microsoft 365 compliance center automatically includes partially indexed items in the estimated search results when you run a search.
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