High Street Retailer Office 365 Migration

Project Details

Customer Sector
6200 User Archives
TrueSwift Migration Factory™
Services Delivered:


The client engaged TrueSwift to provide a managed extraction of legacy mailbox archive messages from their Enterprise Vault (EV) environment to Office 365 and to PST files.

The use of the TrueSwift Migration Factory environment was contracted and ~12TB of compressed EV data was shipped to TrueSwift loaded on to a NAS, which in turn was connected to the Migration Factory application server.

About The Engagement

The project was run as 2 phases, with the first phase being a small 24 user archive pilot and the second phase containing the remainder of the EV system data consisting of 9,064 archives.

The production migration to Office 365 was carried out in batches of users, supplied to us by the client on regular intervals which coincided with the client’s user mailbox migration to Office 365. This resulted in the user having access to their EV archived data placed in to the Office 365 Personal archive, shortly after their mailbox had been transferred to Office 365 by another one of the client’s internal project.

The migration of EV data to Office 365 was only carried out for current users, with the remainder of EV data archives being migrated out to PST files.

The PST files were created with a 5GB size limit and therefore archives greater than 5GB in size migrated to multiple PST files. All of the PST data created was split by user and copied to a NAS, which was shipped back to the customer.

The engagement was hosted in the TrueSwift Data Centre and utilised the TrueSwift Migration Factory environment.

Weekly Webex calls were held with the client to keep them up to date with progress and any issues.


  • TrueSwift delivered a plan to achieve the migration of over 2TB of archived data from SourceOne to PST. The customer received expert knowledge pertaining to this type of project.
  • The customer objectives were achieved in a timely manner.
  • The customer received a flexible approach to the migration that fitted in with the demands of their day to day working.
  • The customer has achieved the goal of extracting the required data from their SourceOne environment in a satisfactory format. This will now allow them to decommission the SourceOne environment without the need to upgrade or continue with maintenance costs.

About TrueSwift

TrueSwift - Data management experts

TrueSwift delivers expert Information and Data Management solutions.

As independent specialists we focus on 4 key areas -

  • GDPR Services & Solutions
  • PST Discovery and Migration
  • Archived Data Migration
  • eDisclosure Services and Solutions

Our clients, whether a FTSE 100 blue chip or local SME, leverage the significant experience we have in delivering complex data solutions in these areas since 1999.

How can we help you?

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