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Enterprise eDiscovery guide

Export Microsoft Purview PST Files to RedactBox

Complete step-by-step guide for Microsoft 365 eDiscovery export and email redaction workflow

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  • eDiscovery export
  • PST format
  • Compliance ready

Process overview

This workflow is essential for Subject Access Requests (SAR), Freedom of Information (FOI) requests, litigation holds, regulatory investigations, and compliance scenarios requiring email redaction before disclosure.

  1. 1Access Purview
  2. 2Create search
  3. 3Export results
  4. 4Download PST
  5. 5Import to RedactBox

Why use this workflow

Streamline your Microsoft Purview to RedactBox integration with these key benefits.

Enterprise security

Maintain compliance with enterprise-grade security throughout the export and redaction process

eDiscovery integration

Integrate with Microsoft Purview eDiscovery for legal and compliance workflows

Regulatory compliance

Meet GDPR, FOIA, and other regulatory requirements for email disclosure

Prerequisites

What you need before starting the export process.

eDiscovery Manager permissions

You must be assigned to the eDiscovery Manager role group in Microsoft Purview, which includes the Export management role required to download search results.

Microsoft 365 subscription

Your organisation must have Microsoft 365 E3, E5, or equivalent subscription with Microsoft Purview eDiscovery capabilities enabled.

RedactBox account

A RedactBox account (free to get started, pay only when you need more) to process and redact your exported PST or MBOX files.

Step-by-step guide

Follow these detailed steps to export PST files from Microsoft Purview and import them into RedactBox.

  1. 1

    Access Microsoft Purview

    Microsoft Purview is Microsoft 365's unified compliance and data governance platform that includes powerful eDiscovery capabilities for legal and compliance purposes.

    • Navigate to compliance.microsoft.com

      Sign in with your Microsoft 365 account that has eDiscovery Manager permissions

    • Select eDiscovery from the Solutions menu

      Click on eDiscovery (Standard) or eDiscovery (Premium) depending on your licence

    • Create a new case or select an existing one

      Cases help organise your eDiscovery work by matter, investigation, or request

    Important note

    The classic eDiscovery experiences were retired on 31 August 2025. Use the new eDiscovery experience in the Microsoft Purview portal for all export operations.
  2. 2

    Create content search

    Define the search criteria to identify the specific emails you need to export for redaction.

    • Navigate to the Searches tab within your case

      This is where you'll create and manage your content searches

    • Click New search and provide a descriptive name

      Use meaningful names like SAR-John-Smith-2024 for easy identification

    • Define locations to search

      Select specific mailboxes, all Exchange mailboxes, or organisational groups

    • Add search conditions and keywords

      Use date ranges, keywords, senders, recipients, or other criteria to narrow results

    • Run the search and review results

      Verify the search captured the correct emails before proceeding to export

    Search tips

    For SAR requests, search for the data subject's email address as both sender and recipient. For FOI requests, use keyword searches related to the request topic.
  3. 3

    Export search results

    Configure your export settings to download the search results in PST format.

    • Select your completed search

      Ensure the search has finished running and results are available

    • Click Actions and select Export results

      This opens the export configuration panel

    • Provide an export name

      Use a descriptive name to identify this export later

    • Configure export options

      Choose All items, including ones with unrecognized format, encrypted, or weren't indexed for complete export

    • Select PST format for Exchange content

      Choose One PST file per mailbox or One PST file containing all messages based on your needs

    • Enable de-duplication if needed

      This removes duplicate email messages from the export

    • Start the export

      The system will prepare your export package in Azure storage

  4. 4

    Download PST files

    Once the export is prepared, download the PST files to your local system.

    • Navigate to the Exports tab

      View all export jobs and their status

    • Wait for export completion

      Export processing time varies based on data volume, from minutes to several hours

    • Select your completed export

      Click on the export name to view details

    • Click Download packages

      Modern browsers will handle the download directly without additional tools

    • Save PST files to a secure location

      Store downloaded files on an internal drive with appropriate security controls

    Download deadline

    Export packages are available for download for 14 days. After this period, you'll need to recreate the export.
  5. 5

    Import into RedactBox

    RedactBox supports both PST and MBOX formats directly, so you can import your files immediately:

    • Log into RedactBox Console

      Access your RedactBox account at console.redactbox.co.uk

    • Click the upload button in the top right corner

      This will open the file upload interface

    • Select your PST or MBOX file

      You can also drag and drop the file directly. Both PST and MBOX formats are supported

    • Monitor upload and processing progress

      Processing time varies based on file size and email count

    • View processed emails in the sidebar

      Begin your redaction workflow once processing is complete

    Next steps

    Once your files are uploaded to RedactBox, you can begin the redaction process. The platform will help you identify and redact personal information, ensuring compliance with your disclosure obligations.View full upload guideAccess RedactBox

When you'll need this workflow

Common scenarios where Microsoft Purview to RedactBox integration is essential.

Subject Access Requests (SAR)

When individuals request their personal data under GDPR Article 15 or CCPA, you'll need to export their emails from Microsoft Purview and redact other people's personal information before providing the response.

Legal eDiscovery and litigation

During legal proceedings, export relevant emails using Purview eDiscovery and redact privileged, confidential, or personal information before sharing with legal counsel or opposing parties.

Freedom of Information (FOI) requests

Public sector organisations receiving FOI requests often need to export relevant emails and redact personal information, commercial confidentiality, or other exempt information before disclosure.

Regulatory investigations and audits

When responding to regulatory investigations or compliance audits, export relevant communications and redact sensitive information before submitting to regulators or auditors.

Internal compliance reviews

For internal investigations or compliance assessments, export employee communications while protecting personal information of uninvolved parties and maintaining confidentiality.

Questions

Does RedactBox support PST files directly?

Yes. RedactBox supports both PST and MBOX file formats natively. You can upload PST files exported from Microsoft Purview directly to RedactBox without any conversion needed.

What permissions do I need for Microsoft Purview exports?

You must be assigned to the eDiscovery Manager role group in Microsoft Purview, which includes the Export management role. Your Microsoft 365 administrator can grant this access through the Microsoft Purview portal.

How long does a Purview eDiscovery export take?

Export times vary significantly based on data volume. Small exports (few hundred emails) may complete in 10-30 minutes, while large organisational searches with thousands of emails can take several hours. Exports are processed asynchronously in Azure.

Can I search across all mailboxes in my organisation?

Yes, with appropriate permissions (eDiscovery Administrator or Organization Management), you can create searches that span all mailboxes in your Microsoft 365 organisation or target specific users, groups, or organisational units.

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