eDiscovery 'cases' - deduplication on export

Richard Lund 0

The new Microsoft eDiscovery cases option which is replacing the classic version, while the search experience is nice, i didnt find the de-duplication on export option.

https://learn.microsoft.com/en-us/purview/edisc-search-export

Is this someting that is going to be added as an option later or is this option being removed?

I export data and that deduplication option is important.

J N S S Kasyap 860 Reputation points Microsoft External Staff

2025-03-06T16:16:17.4366667+00:00

@Richard Lund
Just checking in to see if the below answer helped. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

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J N S S Kasyap 860 Reputation points Microsoft External Staff

2025-03-05T17:16:36.45+00:00

Hi @Richard Lund
Thanks for posting your query!

When you export search results, you have the option to enable deduplication so that only one copy of an email message is exported even though multiple instances of the same message might have been found in the mailboxes that were searched. For more information about deduplication and how duplicate items are identified, see Deduplication in eDiscovery search results.

Therefore, the deduplication option has not been removed in the new eDiscovery experience; it continues to be available to help streamline your data export process

Please refer below link for more insights,
https://learn.microsoft.com/en-us/purview/ediscovery-export-content

Hope this helps. Do let us know if you any further queries.

If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.
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J N S S Kasyap 860 Reputation points Microsoft External Staff

2025-03-07T16:19:38.5833333+00:00

@Richard Lund
Following up to see if the above answer was helpful. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

Richard Lund 0 Reputation points

2025-03-07T16:44:38.0233333+00:00

@J N S S Kasyap

from your link:
This article applies only to the classic eDiscovery experience. The classic eDiscovery experience will be retired in August 2025 and won't be available as an experience option in the Microsoft Purview portal after retirement.

the new ediscovery 'cases' area will not have the de-dupe on export available. i have actually confimed this elsewhere

J N S S Kasyap 860 Reputation points Microsoft External Staff

2025-03-07T20:58:24.0033333+00:00

@Richard Lund
In the new eDiscovery (Premium) experience, deduplication during export is not available. Instead, deduplication is performed during the data ingestion phase when content is added to a review set. This means that only unique items are added to the review set, and duplicates are excluded at that point. Consequently, during export from the review set, deduplication is not necessary, as it has already been addressed during ingestion.
Therefore, while the deduplication process still exists in eDiscovery (Premium), it occurs earlier in the workflow—during data ingestion into the review set—rather than at the export stage. This shift ensures that only unique items are reviewed and exported, streamlining the eDiscovery process.
For a comprehensive understanding of how eDiscovery (Premium) handles deduplication for various content types, please refer to the official Microsoft documentation:
https://learn.microsoft.com/en-us/purview/ediscovery-teams-workflow#deduplication-of-teams-content
Hope this helps. Do let us know if you any further queries.

J N S S Kasyap 860 Reputation points Microsoft External Staff

2025-03-10T02:59:39.74+00:00

@Richard Lund
We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.
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