We help Microsoft-centric enterprises fully adopt the cloud & adapt to new ways of working.
Email Archive Migration :


Future-proof your legacy email archives


Get a fixed-price for us to migrate your email archives quickly, securely & seamlessly.

By migrating your legacy on-premises or third-party cloud archives to Microsoft cloud, you’ll get to reap many benefits such as reduced risk, anywhere accessibility and lower costs.

Ever mindful of the fact that budgets are always stretched, we can also empower your own IT team to complete your migration.


The benefits of our email archive migration service

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Work with an experienced team

Essential has been helping enterprises migrate their email records from one platform to another for well over 20 years.

We know what it takes to get the best outcomes for everyone involved, getting quick results, zero downtime for users and full compliance for your legal department.

Get advanced control

Our migrations offer sophisticated control and can cope with virtually any anomaly.

  • Exclude what you don’t need, e.g., items > 7 years
  • Merge archives belonging to the same person (common after a relocation or name change)
  • Handle (& optionally re-write) different email addressing conventions
  • Identify leavers, orphaned mailboxes, etc.

Be confident of the outcome

Our team, solutions and processes, will ensure a reliable and compliant migration.

  • Detailed chain of custody reports account for each message
  • Automatic failover, logging & task re-runs avoid data loss
  • Critical metadata is preserved for legal teams (e.g., BCC’d recipients & DL members).

What our email archive migrations deliver

100% Compliance

  • Detailed chain-of-custody reports
  • At a glance migration status updates
  • Auto-retries of any failed items


We’ll profile what you have, and present options for dealing with different scenarios. We’ll also advise on and fit around your overall migration strategy, working hand-in-hand with your IT team.


Advanced filtering lets you easily select what gets migrated, where. E.g.

  • Move selected departments/folders/users
  • Move items > 2 years to archive mailboxes
  • Exclude deleted items


High-speed connectors deliver optimum speeds without negative impact on your network or live email/archive services.

A great UX

Archives often use shortcuts in users’ mailboxes. As we migrate your archives we will check their current location and status, converting or removing shortcuts as needed.

This means no surprises ‘post migration’ that could have a negative impact on user productivity & UX.

A Great Track Record

Our archive migration technology is proven in over 2,500 migrations and is trusted by major vendors including Veritas and Microsoft.

We have also performed some of the largest email archive migrations in the world, including a project to move 3PBs.

Supported Platforms


Resources on email archive migration

What our customers have to say about us

email archive migration escalator business people

What our customers have to say

“Although shortcuts would still work across the network after migrating to Microsoft 365, the prospect of maintaining a dedicated email archive on-prem was a non-starter. Essential worked out the best strategy for migrating our archived emails into Exchange Online.”

Stephen Appleby, at An Post
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What our customers have to say

“We did our research into migration methods, including manual extraction, which was deemed totally impractical. We had no issues and no surprises and achieved our objective to complete our migration earlier than scheduled.”

Enterprise Vault customer, financial organisation

What our customers have to say

“The migration approach certainly worked for us so we do not hesitate in recommending this approach to other organisations. We had no issues and no surprises and achieved our objective to migrate all archived email from EAS to the Exchange 2010 Online archive mailboxes. Essential delivered what was promised at the outset.”

IT manager, EAS migration to Office 365
New solution simplifies migrations for Email Journal Archives in Azure

What our customers have to say

“We had no issues and no surprises and achieved our objective to migrate all archived email. Essential delivered what was promised at the outset.”

Dorothy O’Regan, NUI Galway