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Case Study

Consolidation of construction company businesses

Tenant to tenant migration requiring co-existence and a phased approach within a fixed, tight timescale

Client: Aarsleff, Construction Company


  • Consolidation of a group of companies
  • 1000+ users
  • Phased approach required
  • Co-existence required
  • Fixed, tight timescales


  • New Microsoft 365 tenancy for consolidated business
  • Detailed handover has given internal IT team knowledge to provide ongoing support
  • Improved collaboration and work efficiency as result of migration

The challenge

Our client had a very fixed, tight timescale. They were looking to migrate Mail, OneDrive, Teams and SharePoint to consolidate a group of companies into one tenant. The client had identified that the Binary Tree toolset suited their business requirements and they were looking for an implementation expert to help architect the migration and hand over the implementation to their in-house team. They chose Cloud Essentials because we were able to offer the multi-staged approach to the tenant to tenant migration that they were looking for. We’re vendor agnostic and well placed to craft the right implementation project to meet the project’s unique needs.

“Cloud Essentials understand the importance of carrying out a project the right way, no matter the size of it. They don’t take any short cuts.”

Our solution

Expert migration specialists

Migration of Mail, OneDrive, Teams and SharePoint. This 1,000 + user migration required specialists to design and implement a migration plan and have a team of experts on hand to resolve any issues that arose along the way. The project was overseen by an experienced project manager to ensure each stage of the process was executed. They also co-ordinated communications between the teams and made sure the project and scope was completed before the hard stop date.

Detailed handover

Despite the client using our solutions and professional services for their project they did have the technical capacity and capability of managing the project once the preliminary stages and testing had been completed. Therefore, in order to keep costs lower, they opted for a hand over migration service which Cloud Essentials was able to provide.


This tenant to tenant migration required co-existence and a phased approach which Cloud Essentials were also able to achieve.

Expert advice

We’re experts in tenant to tenant migration. Our experienced cloud architects employed their knowledge of similar challenges to ensure that a realistic, thorough implementation plan was drawn up and executed. We helped our client overcome the challenges that the migration brought throughout the hand over period and provided them with a safe and secure migration service.

Transparent communications

Regular daily meetings with the technical team and weekly meetings with key stakeholders kept the project on track.

"Cloud Essentials provided good communication all round."
Cloud Essentials migration to cloud

The Result

We worked closely with our client and consolidated all the work streams into the new tenant within the tight deadlines. A detailed handover between our implementation team and the client’s internal IT team ensures that they have in-depth knowledge of the new infrastructure and will be able to support it in the future. They will also be well placed to undertake similar migration projects in the future, if further consolidation is required. The business units involved are already reporting better collaboration and improved work efficiency following this project.

Let us handle any complexities that your tenant migration may bring