Modernise Microsoft Workloads with AWS

D55 helps organisations modernise Microsoft workloads — from Windows Server to SQL and .NET — by migrating to AWS for greater agility, cost control, and innovation.

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Why Modernise Microsoft Workloads on AWS?

Outdated Microsoft environments often limit scalability, drain budgets, and slow innovation. Migrating to AWS unlocks flexibility, resilience, and financial efficiency by freeing you from restrictive licensing models.

Higher Performance – Run workloads faster on AWS-native compute, storage, and database services.

Lower Licensing Costs – Reduce or eliminate SQL Server and Windows licensing by migrating to Linux and PostgreSQL.

Scalability – Scale infrastructure dynamically with AWS EC2, Aurora, and containerisation.

Security & Compliance – Built-in AWS protection, governance, and managed patching.

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Windows Server Migration

Move workloads to AWS EC2 or containerised Linux environments.

SQL Server Modernisation

Transition to open-source PostgreSQL or Amazon Aurora to reduce cost and dependency.

.NET Application Modernisation

Containerise legacy .NET apps using AWS App Runner or Elastic Container Service (ECS).

Cloud-Native Development

Build future-ready microservices using AWS Lambda, Fargate, and API Gateway.

Security & Governance

Implement AWS-native identity, access management, and compliance controls.

Onboarding Platforms

Tailored to your culture, reducing ramp-up time for new hires.

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Rehost (Lift & Shift)

Quickly migrate Windows and SQL workloads to AWS with minimal change.

Replatform (Lift & Reshape)

Optimise apps by moving databases to managed services like Amazon Aurora or PostgreSQL.

Refactor / Rearchitect:

Rebuild or containerise .NET apps for flexibility and scalability using serverless or microservices architectures

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License Reduction

Replace proprietary SQL Server or Windows workloads with Linux and PostgreSQL.

Right-Sizing & Reserved Instances

Replace proprietary SQL Server or Windows workloads with Linux and PostgreSQL.

FinOps & Governance

Establish cost visibility and guardrails across AWS accounts.

Funding Programs:

Access AWS Migration Acceleration Program (MAP) or Proof of Concept funding to offset costs.

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AWS Expertise

Advanced AWS Partner with proven experience in workload migration and modernisation.

End-to-End Delivery

From assessment and planning to migration, optimisation, and managed improvement.

Proven Frameworks

Repeatable, secure, and compliant processes for Microsoft workloads.

Commercial Advantage

Deep understanding of licensing, funding, and cost optimisation.

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Up to 40% Cost Reduction

From licensing and infrastructure optimisation.

Increased Agility

Modern workloads scale faster and deploy in minutes, not months.

Faster Innovation

Modernised .NET and SQL environments enable quicker product delivery.

Start your journey

Modernise Microsoft Workloads with D55

Don’t let legacy Microsoft systems limit your growth. D55 helps you migrate, modernise, and optimise workloads on AWS, improving agility, cutting costs, and enabling innovation.

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What our Clients Say

“While we led the initial business scoping and discussions with key stakeholders, it was a very smooth process working the D55 team to expand on this vision. The D55 team took ownership of building the solution and worked closely with us throughout the process. The quality of the work, combined with the excellent support during the handover, is exactly what we value in a partner.”

Andrew Thomas

CTO

Amber

"D55 enabled us to migrate from on-premise to a cloud-based solution, resulting in monthly cost savings of about 40%. Cloud-based systems give us a high level of resiliency and an unlimited capacity to scale. We’ve really put in place the foundations for later phases of work and further cost reduction as we scale. It was a partnership as opposed to a service - we work well together. "

Roger Worsley

CTO

kooomo

"Excellent technical knowledge, productive and responsive. Will go the extra mile to ensure customer satisfaction."

Chris Trigg

Co-Founder, Managing Director

ongen

"D55 are a highly experienced team that helped lead our business to push for and deliver an innovative and ambitious legacy to AWS transformation, with confidence. D55 have become a valued development and consultancy partner thanks to their excellent practical capability and their ability to apply the most appropriate working methodology to the challenge at hand."

Ed Berry

Head of Digital Products

switch2

"D55 have helped to develop our CRM system and have been a valued partner in this process. We continue to work with D55 on our application development and would have no hesitation to recommend them."

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Andrew Bright

Director

itp-energised

"D55 have proved to be an excellent development partner offering expertise and predictable delivery, with flexibility to respond to changing business needs. They have helped us explore new AWS technologies, challenged our thinking and sped up our adoption of relevant platform services."

Arran Stevenson

Director of Architecture

ensek

“D55 has been transformative for our business. They understood the business and our challenges and built a system that supports how we work now, as well as leveraging new technologies which are more cost-effective and increase our speed to deliver. Thanks to D55 we don’t have to worry about the day-to-day, so we can focus on the exceptional issues facing our industry."

D55 Client

CTO

energy

Solving problems and supporting innovation

Real-World Success Stories

Our notable area of specialism is the energy sector, where we have deep domain knowledge. However, the commonality of the challenges means that frequently work across diverse industries, including for private equity backed growth businesses, and would love to talk to you about how D55 can redefine how you think about modernisation.

Take a look at our collection of case studies showcasing the transformative impact of partnering with D55 and AWS.

All case studies