Case Study

Microsoft Dynamics NAV 2016 to Dynamics 365 Business Central Upgrade

Name: Dynamics Square UK Ltd. - Birmingham Office
Address: Izabella House, 24 - 26 Regents Place, City Centre, Birmingham, Birmingham, UK, B1 3NJ, United Kingdom
Price range: £££-£££

How a Tooling and Distribution Business Restored Compliance and Rebuilt Trust with Microsoft Dynamics 365

A Crux of the Case Story

This case story reflects how a long-established tooling and distribution business found itself at a critical breaking point—unable to submit VAT returns for the first time in nearly four decades. What began as a regulatory disruption quickly exposed deeper issues across infrastructure, partnerships, and system dependencies.

By working with Dynamics Square, the business not only resolved its immediate compliance crisis but also rebuilt its operational foundation through a carefully managed transition to Microsoft Dynamics 365 Business Central.

Business Overview

This organisation operates within the tooling and construction supply ecosystem, managing a complex distribution model supported by international sourcing and specialised product handling. A significant portion of its inventory is imported, with approximately 80% sourced from China and the remaining 20% from India, creating a supply chain that requires careful coordination, landed cost tracking, and inventory accuracy.

Over the years, the business had developed a system environment tailored to its needs. It relied on a legacy ERP platform supported by bespoke add-ons designed specifically for the tooling and construction industry. These customisations played a critical role in managing day-to-day operations, from inventory handling to supply chain costing.

The system was hosted on-premises and had been in place for several years. While it had supported the business effectively in the past, both the technology and the surrounding infrastructure had begun to age. At the same time, the business had undergone changes in its support structure, including a shift in implementation partners that affected continuity and system knowledge.

This combination of legacy dependency, infrastructure limitations, and partner disruption set the stage for a deeper operational challenge.

What are The
Business Challenges

The business faced a series of interconnected challenges, triggered by both external regulatory changes and internal system limitations.

For the first time in 39 years, the organisation was unable to submit its VAT returns due to HMRC dropping support for older operating systems, which disrupted the required digital process for Making Tax Digital (MTD) compliance.

The “Digital Handshake” required for MTD compliance failed due to the obsolescence of Windows Server 2012, leaving the business legally exposed. The existing ERP system (NAV 2016), running on outdated on-premises.

The existing ERP system (NAV 2016), running on outdated on-premises infrastructure, was no longer compatible with modern security and compliance requirements.

Hardware and operating systems had reached a level of obsolescence that limited system functionality and regulatory alignment.

The retirement of the client’s long-term lead consultant at the previous partner resulted in a complete loss of institutional memory, leaving the business with a partner that did not understand its bespoke tooling workflows.

The transition of their previous partner created a significant knowledge gap, as key expertise was lost and the new partner lacked familiarity with the business and its systems.

The relationship with the partner deteriorated further due to a lack of proactive support and limited understanding of the business’s operational challenges.

Critical bespoke add-ons, originally developed for the tooling industry, were not supported by the new partner, creating uncertainty around system continuity.

The partner did not provide access to the original customisation code, making it difficult to transition or reuse existing functionality.

The business maintained a strong preference for on-premises systems, leading to resistance toward cloud-based ERP solutions.

The complexity of global supply chains, including import logistics and landed cost management, remained tightly linked to legacy system capabilities.

What the Business Needed

At this stage, the organisation needed a solution that could resolve immediate risks while respecting its operational realities and long-standing preferences.

A system upgrade that restores compliance with HMRC and supports Making Tax Digital requirements
A modern ERP platform capable of replacing the ageing NAV 2016 environment
Continuity of critical business functionality previously handled by bespoke add-ons
A partner who understands the tooling and distribution industry and can provide informed guidance
A migration approach that balances modernisation with the organisation’s preference for controlled infrastructure
Support for complex international supply chain operations, including landed cost tracking
A reliable support model to replace the gap created by the previous partner

The focus was not just on replacing software, but on restoring stability, confidence, and continuity.

Business Objectives

The leadership team aligned on a set of clear and practical objectives to guide the transition.

Regain full compliance with HMRC requirements and restore the ability to submit VAT returns

Upgrade the ERP system to a supported and future-ready platform

Preserve critical operational processes currently managed through custom add-ons

Rebuild trust in the implementation partner through a consultative and knowledgeable approach

Ensure continuity of operations during and after system transition

Create a system foundation that can support ongoing business needs without disruption

Solutions Proposed by Dynamics Square

Dynamics Square approached the situation with a focus on understanding before implementation. Rather than pushing a standard upgrade, the team worked to align the solution with the business’s operational realities.

Gap Analysis and Add-On Redevelopment

A comprehensive analysis of existing bespoke add-ons was conducted
Critical functionalities used in tooling and construction workflows were identified
Instead of removing these features, Dynamics Square committed to redeveloping them as modern extensions within Business Central

Consultative Approach and Trust Rebuilding

Focused on demonstrating a deep understanding of the business from the outset
Avoided generic discovery processes and instead provided informed, relevant guidance
Engaged with stakeholders in a way that prioritised clarity and confidence over sales pressure

Hybrid Migration Strategy

Facilitated an upgrade from NAV 2016 to Microsoft Dynamics 365 Business Central
Designed the transition to address compliance requirements while respecting concerns around cloud adoption
Enabled the business to move to a supported system without forcing a fully cloud-first approach

Resolution of Regulatory Compliance

Upgraded system and infrastructure to meet HMRC requirements
Restored the ability to submit VAT returns digitally under Making Tax Digital
Brought the organisation back into full regulatory compliance

Restoration of Partner Support

Provided the dedicated expertise that had been lost with the previous partner
Acted as a consistent and knowledgeable support system for both technical and operational needs
Re-established confidence in the ERP environment through reliable engagement

Results and Impact: What This Transformation Means

The transformation addressed both immediate risks and long-standing operational concerns.

Successfully restored HMRC compliance and enabled digital VAT submissions

Eliminated reliance on unsupported infrastructure and outdated operating systems

Rebuilt critical system functionality through modernised add-ons

Improved system reliability and operational continuity

Reduced dependency on manual workarounds tied to legacy limitations

Strengthened internal confidence in system performance and support

Re-established a stable and informed partnership for ongoing system management

Restored accuracy to international landed-cost calculations for high-volume imports from China and India, which had become unreliable on the failing legacy system

Why This Case Matters and Future Prospects

This case highlights a situation that many long-standing businesses eventually face. Systems that once supported growth begin to limit it, especially when external factors such as regulatory changes accelerate the need for transformation

In this instance, the organisation was not simply operating on outdated software. Over time, it had accumulated significant technical debt. This included ageing infrastructure, unsupported operating systems, undocumented customisations, and dependency on unavailable expertise. That debt remained manageable until HMRC’s regulatory changes exposed it all at once, turning a gradual issue into an immediate operational and compliance risk.

Rather than approaching this as a standard upgrade, Dynamics Square effectively refinanced that technical debt into a modern, supported system. This meant stabilising what existed, rebuilding what was critical, and restructuring the system in a way that could be sustained long term.

The organisation chose a path that balanced urgency with practicality. Instead of forcing a complete shift, it adopted a strategy that respected its existing environment while preparing for the future.

The redevelopment of bespoke functionality ensured that operational strengths were not lost. The hybrid migration approach allowed the business to modernise without compromising its comfort with infrastructure decisions. Most importantly, the restoration of trust in a capable partner provided the stability needed to move forward.

Further optimisation of supply chain and inventory processes
Gradual adoption of additional Business Central capabilities
Potential expansion into broader cloud-based services as confidence grows
Continued enhancement of custom functionality to match business needs

This journey reflects more than a technical upgrade. It demonstrates how accumulated technical debt, when addressed with the right strategy, can be transformed into a stable and scalable foundation.

Dynamics Square played a central role in enabling this transition, delivering not just a solution, but a path forward built on clarity, capability, and trust.

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