Journal Migrations

The best way to migrate your legacy email journals quickly and securely

Changing the view on Journal migrations

If you want to migrate your journals to Microsoft 365, you face a significant challenge – there is no conventional journal mailbox. This means you need a solution and one that follows the strict rules to meet Microsoft terms of service.

Transvault offers a range of Microsoft 365 journaling solutions for handling the future of your journals and journal archives:

Our Partners tell us that our Compliance Time Machine technology for journals is just one of the ways that Transvault stands out from its competitors – we were the first migration specialist with this capability and have continually enhanced the solution. Others have been trying to emulate it ever since.

Darwin Lee Transvault CEO
email archive migration specialists

Key benefits

Why Transvault Journal migration is a good choice

  1. High-performance, big data handling

    Transvault allows large journal archives to be split into a number of separately handled virtual mailboxes. By doing this, multiple processing threads can be applied to the migration of a single mailbox, significantly speeding up the migration task.

  2. Ensure Future Compliance

    Your legacy data is migrated into Microsoft 365 so that it conforms fully to Microsoft compliant data retention policies, data structure and eDiscovery practices. All of this means that Microsoft’s licensing policy is respected.

  3. Preserve Leaver’s Data

    A full analysis of Journal messages will mean informed decisions can be made about what to migrate before processing begins. This includes the ability to take advantage of Microsoft’s inactive mailboxes service to ensure future retention and eDiscovery of leaver’s email held in journals.

  4. Protects All Metadata

    All message recipient information will be fully available for eDiscovery inclusive of any BCC’d recipients, distribution list members, messages sent ‘on behalf of’, etc. The risk of any legacy data being accidentally excluded from eDiscovery workflows is eliminated.

Migrating Journals to Microsoft 365?

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Journal migration options

Simple Journal Migration

Transvault’s simple journal migration service can be used to migrate existing journals into one or more ‘shared mailboxes’ in Microsoft 365.


Transvault delivers full chain-of-custody and the detailed auditing demanded of a compliance-led data migration.  We also reconstruct emails into a ‘regular user format’ and ensure that vital BCC’d and Distribution List recipients are preserved and visible to the Microsoft 365 eDiscovery process as email metadata.

Advanced Journal Migration

Developed in conjunction with Microsoft, the Compliance Time Machine (CTM) feature of Transvault Migrator, offers a unique service that is a zero-risk solution for migrating a journal archive to Microsoft 365 in such a way that email compliance records are:


  • Complete and fully available for eDiscovery, inclusive of any BCC’d recipients, distribution list members, messages sent ‘on behalf of’, etc.
  • Conformant to Microsoft’s compliance and data models, and mailbox licensing policy.
  • Accurately arranged into individual custodian mailboxes to ensure all the relevant mailboxes are included by legal staff as part of any future eDiscovery exercise.
  • Securely and reliably transferred, with full, demonstrable chain-of-custody and integrity.

Migration to a separate Journal

Transvault has partnered with a market-leading Cloud-native storage provider to offer their journal archive solution where the journal can be directly migrated and your compliance data retained independently of your Microsoft 365 mailboxes.

  • We ensure your legacy journal archives are formatted in the correct envelope journal format with all vital metadata preserved.
  • Super-fast, end-to-end migration ensures your journal migration maintains full chain-of-custody.
  • The ability to extract journal contents based on date range (and optionally, based on custodian) enables you to respond rapidly to any litigation requests.

Just-in-time Migration

If your journal is extremely large, you might elect to adopt an age-in-place strategy, whereby you might maintain your journal in on-premises storage.

In this case you can take advantage of Transvault to index its contents for rapid collection into your eDiscovery process at a future date, reducing the need to manage and fund archive eDiscovery capability (e.g. Discovery Accelerator).

Relevant Journal migration resources