Compliance Problems

Fix eDiscovery Export Button Not Working for Large Searches

John WilsonJohn Wilson Nov 3, 2026 869 views

Question details

The user is unable to export large volumes of email results because the eDiscovery Export button becomes unresponsive, though it works fine for smaller searches.

Fix eDiscovery Export Button Not Working for Large Searches
Product
Exchange Online
Device & OS
not provided
Scenario
Exporting a large batch of compliance email search results using the eDiscovery tool.
Observed behavior
The eDiscovery Export command does nothing and appears completely unresponsive when the search returns a massive number of results.
Before you start

Verify that your account has the correct eDiscovery Manager or Administrator roles assigned, and ensure you are using a fully supported browser like Microsoft Edge to prevent extension-related blocks.

Solution 1Recommended

Reduce Search Scope and Export in Batches

Large exports can exceed Microsoft's system limits, causing the button to become unresponsive. Batching the exports resolves this issue.

When an eDiscovery search returns a massive volume of items, the export command can time out or fail to respond. Microsoft has specific item count and size limits for eDiscovery exports. Breaking the overarching search down into smaller segments ensures you stay within these safe operating parameters.

1
Access your eDiscovery case

Navigate to the Microsoft Purview compliance portal, go to eDiscovery, and select your specific case.

2
Edit the search criteria

Select the problematic search and click 'Edit'. Narrow down your search query by shortening the date range or adding more specific keywords to filter out excess data.

3
Run the modified search

Save and run the new, smaller search. Wait for the search estimation to complete and verify the total result size is significantly lower.

4
Export the smaller batch

Click the Export button again to process this smaller batch. It should now respond normally. Repeat this process by creating new searches for the remaining date ranges.

Reduce Search Scope and Export in Batches
Batching Tip: Keep each individual export batch under 2 GB or 10,000 items to ensure the highest success rate and fastest download speeds.
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Frequently Asked Questions

What is the maximum size for an eDiscovery export in Microsoft 365?

Microsoft typically limits a single PST export file to 10 GB to ensure data integrity and prevent file corruption, though the total size of an export job can be larger depending on your organization's specific Microsoft 365 subscription limits.

Why does the eDiscovery Export Tool get stuck or refuse to launch?

The tool often becomes unresponsive when the volume of data vastly exceeds system processing thresholds. Alternatively, it may fail to launch if your web browser blocks the required ClickOnce extension necessary for downloading the results.

How do I download eDiscovery search results to a local drive?

Once the export job finishes preparing in the cloud, you can download the results to a local drive using the eDiscovery Export Tool. You will need to copy the unique export key provided in the Microsoft Purview portal and paste it into the tool to authenticate the download.