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Move journal mailboxes to Office 365

Discover the best way to migrate your email journals to Office 365

Migrate to the new Office 365 Compliance Model

In the past, if you wanted to retain a copy of every single email sent and received by your organisation to meet compliance and future eDiscovery needs, you would have written email traffic into a journal.

Office 365 does not have a journal mailbox.

Instead, Office 365 replaces the ‘traditional’ journal with the following features:

  • Instead of a large, centralized, single-instanced mailbox that is difficult to scale and failover, Microsoft uses its optimized multi-instance storage model.  This allows each user to retain a copy of all emails sent/received with zero performance penalty and no single point of failure.
  • By putting all relevant mailboxes on In-Place Hold, all emails sent and received are retained indefinitely.
    • When users delete emails, they are moved into a special hidden folder that is available to the eDiscovery process.
    • Any BCC’d recipients are retained in the senders’ mailboxes.
  • The members of any distribution lists (DLs) are expanded at the point of sending and stored in hidden headers.
  • Inactive mailboxes (i.e. leavers) can be put on Indefinite Hold and made available for eDiscovery, without a license penalty.


By providing these services, Microsoft has enabled Office 365 to effectively replace the role of the journal, ensuring its customers can meet regulatory compliance demands and achieve information governance and eDiscovery in a single, cloud-based repository.

TransVault delivers both a Simple and Advanced approach to migrating your journals into Office 365 with confidence.

Advanced Journal Migration

Developed in consultation with Microsoft, TransVault offers a unique service that is the only zero-risk solution for migrating a journal archive to Office 365 in such a way that email compliance records are:

  • Conformant to Microsoft’s compliance model and mailbox licensing policy.  See https://technet.microsoft.com/en-GB/library/exchange-online-limits.aspx
  • Complete and fully available for eDiscovery, inclusive of any BCC’d recipients, distribution list members, messages sent ‘on behalf of’, etc.
  • Accurately organized into 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 and demonstrable chain-of-custody and integrity.

Simple Journal Migration

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

As well as delivering full chain-of-custody and the detailed auditing demanded of a compliance-led data migration, TransVault gives the option of reconstructing the email into a ‘regular user format’ and ensuring that vital BCC’d and Distribution List (DL) recipients are preserved and visible to the Office 365 eDiscovery process as email metadata.


Get in touch to find out which approach is best for your journal migration needs.

Find out more about Journal Migrations

High-performance, big data handling

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

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. in the usual way.  The risk of any legacy data being accidentally excluded from eDiscovery workflows is eliminated.

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.

Ensure Future Compliance

Your legacy data is migrated into Office 365 so that it conforms fully to Microsoft’s Office 365 compliant data retention and eDiscovery model.  It also ensures Microsoft’s Office 365 licensing policy is respected.

You benefit when you work with TransVault™

  • Certified by Microsoft™
  • Unparalelled scalability
  • Content level control
  • Manage and migrate content in line with policies
  • Fully compliant – complete chain-of-custody
  • Advanced control
  • Runs on-prem or in Azure
  • Proven in over 2,000 enterprise migrations

“TransVault has been very helpful on this complex issue of EV Notes to EV Exchange migration planning. Outstanding support from very knowledgeable engineers. Thank you!”

Salim Othman - Bluesource Information Ltd

“Thanks very much for the support provided to a fledgling TransVault engineer; much appreciated!”

Derek Lewinson - EMC

“I have to say that I have been impressed by TransVault's agility and flexibility throughout our Office 365 migration project”

Messaging Specialist - Large IT Services Company

“One of the biggest challenges in archive migrations is that there is always something different. I can go to TransVault and my problem goes away very quickly. I've worked with many new partners in Symantec and we've never had the support like we do from TransVault. I've yet to see another partner who can deliver like that.”

David DeMings - Symantec

“I'm not sure if you have visibility on this, but wanted to drop a quick note of THANKS for your help in getting such quick support and turnaround. It was very important to our client, and I think they were impressed that TV really stepped up and took responsibility for getting the job done.”

Dan Sullivan - US Amplify

“TransVault has pioneered the migration market space and has produced a benchmark whereby all migration companies are measured.”

Dennis Wild - Product Manager, Archiving (IAP) at Hewlett-Packard

“You guys are legend!!! Thanks very much!!!!!!!!!!!!!!!!”

Max Massioni - Consultant, Bluesource

“I figured I'd share some feedback regarding TransVault. I must confess that these migration rates are certainly amazing now that the processes are running. A good average throughput comes to just roughly under 20GB per hour. Not one other tool in the market produces these results! I guess I couldn't keep this to myself.”

Chris Mathe - Account Executive, US-Amplify

“Archive migrations are technically (and politically) challenging projects. Our archiving expertise, combined with our project management methodologies and Transvault's advanced archive migration capabilities, enable us to meet customer requirements that are completely out of reach for any sort of "brute force" approach ”

JD Creedon - GlassHouse

“We're one of Microsoft's go-to partners for migrations to Office365. TransVault enables us to add significant value for both Microsoft and our customers by selectively migrating archived mail directly to Office365 along with mailboxes and live mail.”

Jerry Martin - Core BTS

“TransVault's partner certification a challenging and tough yet well written exam for a terrific product.”

Ben Shorehill - Insentra

“TransVault Insight has been designed and developed by a team that understands the business needs of orgs. This team has worked with large global 2000 enterprise customers with 100ks of employees dispersed across multiple global server sites.”

Andrew Moffat - Founder of Educom (Original author of EAS)

“On Monday morning our users came in to find all their e-mails and address books intact and fully functional. We could just get on with business as usual.”

Eugene vanVueren - IT manager - Webber Wentzel Bowens

“I would say that the project was very well co-ordinated and went about as smooth as it can go!”

John Twilley - Senior Network Engineer - Catalina Marketing

“I would like to give you all a huge thank you for all your hard work and effort that was put into finding such a speedy solution to migrating Japanese messages. This quick solution has put us in a seriously good light with our client. You guys have an unbelievably professional team and are an absolute pleasure to work with.”

Warren Marks - Senior Engineer - SOARsoft Africa