Cloud Migration Services and Strategy: A Complete Guide for Businesses

Moving business systems, applications and data to the cloud can help organisations improve scalability, accessibility, security and operational efficiency. However, successful cloud migration requires more than simply moving workloads from on-premises servers to a cloud platform.

Businesses need a clear migration strategy, suitable cloud architecture, data protection measures, testing processes and ongoing management. Choosing the right cloud migration services and an experienced partner can also reduce migration risks and help ensure the project supports wider business goals.

In this guide, we explain what cloud migration involves, the different types of migration, common migration strategies, the migration process, costs, challenges and how to choose the right cloud migration service provider.

What is Cloud Migration?

Cloud migration is the process of moving business data, applications, workloads, databases, infrastructure or other IT resources from an existing environment to a cloud platform.

The source environment may be an on-premises data centre, legacy server infrastructure, a private cloud or another public cloud platform. Depending on business requirements, organisations may move workloads to platforms such as Microsoft Azure or use a hybrid approach that keeps some systems on-premises.

Cloud migration does not always mean moving everything at once. A business may migrate selected applications first, move data separately or use different migration strategies for different workloads.

What are Cloud Migration Services?

Cloud migration services cover the planning, assessment, migration, testing and optimisation activities required to move workloads to a cloud environment.

A cloud migration project can include:

• Cloud readiness assessment

• Migration strategy and roadmap development

• Data and database migration

• Application migration

• Server and infrastructure migration

• ERP and CRM migration

• Hybrid cloud migration

• Cloud-to-cloud migration

• Application modernisation

• Security and compliance planning

• Testing and validation

• Go-live and cutover support

• Post-migration monitoring and optimisation

The services required depend on the organisation's existing technology, business objectives, workload dependencies, data volume, compliance requirements and target cloud platform.

Types of Cloud Migration Services

There is no single migration approach that works for every business. Different workloads may require different migration methods based on their technical and business requirements.

Datacentre to Cloud Migration

Datacentre migration involves moving workloads, applications, databases and infrastructure from on-premises servers or a private datacentre to a cloud environment.

This approach can help organisations reduce their dependence on physical infrastructure while gaining access to cloud-based scalability and management capabilities.

Before migration, businesses should assess server utilisation, application dependencies, data volumes, security requirements and compatibility with the target cloud environment.

Hybrid Cloud Migration

Hybrid cloud migration combines on-premises infrastructure with cloud services. It can be suitable when some workloads need to remain on-premises because of technical, regulatory, operational or business requirements.

For example, an organisation may keep certain systems in its existing environment while moving customer-facing applications, analytics workloads or selected business data to the cloud.

A well-designed hybrid environment requires appropriate integration, identity management, networking, security and governance.

Cloud-to-Cloud Migration

Cloud-to-cloud migration involves moving applications, workloads or data from one cloud provider or cloud environment to another.

Businesses may consider cloud-to-cloud migration when their existing platform no longer meets their requirements, when they want to consolidate cloud environments or when another platform provides a better fit for specific workloads.

The migration plan should consider data transfer, application dependencies, integrations, security, licensing and potential downtime before the move.

Application Migration

Application migration moves business applications from an existing environment to a cloud platform. Depending on the application, it may involve a straightforward move or require application changes before migration.

Legacy applications should be assessed before migration to identify compatibility issues, dependencies, performance requirements and potential modernisation opportunities.

Data and Database Migration

Data migration involves transferring business data and databases to the target cloud environment while maintaining data integrity, availability and security.

A data migration project should consider data quality, duplicate records, data mapping, backup requirements, transfer methods, validation and access controls.

ERP and CRM Cloud Migration

Businesses can also migrate legacy ERP and CRM environments to modern cloud-based business applications.

For example, organisations using legacy Microsoft Dynamics systems may consider Dynamics GP to Business Central migration or Dynamics AX to Dynamics 365 migration.

ERP and CRM migration requires additional planning because business processes, integrations, historical data, user roles and reporting requirements must continue to work after migration.

Cloud Service Models

Cloud environments are commonly delivered through three service models: SaaS, PaaS and IaaS.

The right model depends on how much infrastructure and application management the business wants to retain and how much it wants the cloud provider to manage.

What is a Cloud Migration Strategy?

A cloud migration strategy is a structured plan that defines what should be migrated, why it should be migrated, how each workload should be handled and when the migration should take place.

A strong strategy should connect technical migration decisions with business objectives. Before selecting an approach, organisations should understand their current IT environment, workload dependencies, security requirements, costs and desired future state.

Cloud Migration Strategies: The Different Approaches

Different workloads may require different migration strategies. Microsoft Azure's current Cloud Adoption Framework describes several workload treatment options, including rehost, replatform, refactor, rearchitect, rebuild, replace, retain and retire.

1. Rehost

Rehosting, sometimes called a lift-and-shift migration, moves a workload to the cloud with minimal changes.

This approach can be suitable when a business wants to migrate relatively quickly without making significant changes to the application.

2. Replatform

Replatforming moves a workload to a more suitable cloud platform with limited application changes.

The objective is usually to gain some cloud benefits, such as reduced infrastructure management or improved reliability, without completely rebuilding the application.

3. Refactor

Refactoring involves changing application code to improve its maintainability, performance or suitability for the cloud while retaining its core functionality.

This approach may be appropriate when existing technical debt or application limitations would reduce the value of a simple lift-and-shift migration.

4. Rearchitect

Rearchitecting involves changing the underlying architecture of an application to support improved scalability, agility or cloud-native capabilities.

This can require more planning and development effort than rehosting or replatforming, but it may be appropriate when the existing architecture limits future business or technical requirements.

5. Rebuild

Rebuilding means developing a new cloud-native solution rather than moving the existing application with minimal changes.

This approach may be considered when a legacy application is too outdated, difficult to maintain or unsuitable for modern cloud requirements.

6. Replace

Replacing involves moving from an existing application to a suitable SaaS or commercial cloud solution.

For example, a business may replace a heavily customised legacy application with a modern SaaS platform if it meets the required business processes and integration needs.

7. Retain

Not every workload needs to move immediately. Retaining means keeping a workload in its current environment when migration does not currently provide sufficient business value or when technical, regulatory or operational dependencies need to be addressed first.

8. Retire

Retiring means decommissioning workloads that are obsolete, duplicated, underused or no longer provide sufficient business value.

Identifying workloads that can be retired before migration can reduce the number of systems that need to be moved and simplify the overall migration project.

Cloud Migration Process: Step by Step

A successful cloud migration should be planned as a controlled process rather than a single technical move.

Step 1: Assess the Existing Environment

Start by identifying applications, servers, databases, users, integrations, dependencies and data that may be affected by migration.

This assessment helps establish which workloads are suitable for migration and which may require modernisation, replacement or retention.

Step 2: Define Business Objectives

Determine why the organisation wants to migrate. Common objectives may include improving scalability, reducing infrastructure dependency, modernising applications, improving resilience or supporting business growth.

Clear objectives make it easier to measure whether the migration delivered the expected business outcome.

Step 3: Build the Migration Roadmap

Create a migration roadmap that defines workloads, priorities, dependencies, resources, timelines, risks and migration waves.

Large environments should generally be divided into manageable migration waves rather than attempting to move every workload simultaneously.

Step 4: Prepare the Cloud Environment

Before moving production workloads, prepare the target cloud environment, including identity, networking, security, governance, monitoring and required infrastructure.

Step 5: Migrate Data and Workloads

Move workloads according to the agreed migration sequence. Depending on the strategy, this may involve transferring data, moving applications, rebuilding components or connecting existing systems with cloud services.

Step 6: Test and Validate

Testing should cover application functionality, integrations, performance, data accuracy, user access and security.

Business users should also validate critical processes before the final production cutover.

Step 7: Go Live

Once testing is complete, the organisation can move the approved workload into production. The cutover plan should include communication, support resources and a fallback approach where appropriate.

Step 8: Monitor and Optimise

Migration does not end at go-live. Businesses should monitor performance, security, availability and cloud resource usage and make improvements where required.

Benefits of Cloud Migration

Cloud migration can provide several business and operational benefits when the migration is properly planned and the target environment is designed around business requirements.

Scalability

Cloud infrastructure can provide access to resources that can be adjusted as workload requirements change, helping businesses respond to growth or changing demand.

Reduced Infrastructure Dependency

Moving suitable workloads to the cloud can reduce dependence on physical servers and datacentre infrastructure.

Improved Accessibility

Cloud-based applications and services can support access from different locations, subject to the organisation's identity, security and access policies.

Business Continuity and Resilience

Cloud platforms provide capabilities that can support backup, disaster recovery and resilient application architectures. The actual level of resilience depends on how the environment is designed and managed.

Modernisation Opportunities

Migration can provide an opportunity to review legacy workloads and decide whether they should be rehosted, replatformed, refactored, rearchitected, replaced, rebuilt, retained or retired.

Centralised Management and Monitoring

Cloud management and monitoring capabilities can provide greater visibility into workloads, performance, resource usage and operational issues.

Cloud Migration Challenges and Risks

Cloud migration can deliver significant benefits, but businesses should understand the potential risks before starting the project.

• Data migration risk: Large or poorly structured datasets can make migration more complex.

• Application dependencies: Applications may rely on systems or integrations that are not immediately visible.

• Downtime: Certain migrations may require planned downtime during cutover.

• Security: Identity, access, network configuration and data protection need to be planned carefully.

• Cost management: Cloud costs need to be monitored and managed after migration.

• Legacy compatibility: Older applications may require remediation or modernisation before they can be migrated.

• User adoption: Changes to systems and processes may require training and communication.

• Skills and resources: Internal teams may require additional cloud expertise during the migration.

How Much Does Cloud Migration Cost?

There is no single price for cloud migration. The cost depends on the size and complexity of the environment and the services required.

Key factors that can affect cloud migration costs include:

• Number of applications and workloads

• Volume and type of data

• Existing infrastructure

• Application complexity

• Integration requirements

• Security and compliance requirements

• Migration strategy selected

• Required testing and downtime planning

• Cloud infrastructure and licensing costs

• Post-migration support and optimisation

A proper assessment is therefore important before creating a migration budget.

How Long Does Cloud Migration Take?

Cloud migration timelines vary significantly between organisations. A small workload with limited dependencies may be migrated relatively quickly, while a large ERP environment with multiple integrations and large datasets can require a longer, phased programme.

The timeline is influenced by:

• Number of workloads

• Data volume

• Application dependencies

• Migration strategy

• Testing requirements

• Security and compliance requirements

• Integration complexity

• Availability of internal resources

Breaking a large migration into controlled waves can make the project easier to manage and allows lessons from earlier migrations to improve later waves.

What are Cloud Migration Consulting Services?

Cloud migration consulting services help businesses assess their existing technology environment, define migration objectives and create a practical roadmap before the migration begins.

A cloud migration consultant may help with:

• Current-state assessment

• Cloud readiness analysis

• Workload discovery and dependency mapping

• Migration strategy selection

• Cloud architecture planning

• Cost and resource planning

• Security and governance considerations

• Migration roadmap development

• Risk identification

• Migration wave planning

This consulting stage is particularly useful for businesses with complex legacy environments or limited internal cloud expertise.

How to Choose Cloud Migration Service Providers

Choosing between cloud migration service providers should involve more than comparing service descriptions or pricing.

Businesses should evaluate a provider based on its technical capabilities, migration methodology, relevant experience and ability to support the organisation after go-live.

Assess Technical Expertise

Check whether the provider has experience with the cloud platform, applications, databases and technologies used by your organisation.

Review Migration Methodology

Ask how the provider approaches assessment, planning, testing, migration waves, cutover and post-migration support.

Check Relevant Business Experience

A provider that understands your industry and business processes may be better positioned to identify dependencies and requirements that are not purely technical.

Understand Security and Governance

Ask how security, identity, access control, data protection, compliance and governance will be handled throughout the migration.

Ask About Post-Migration Support

Migration should not be treated as the end of the project. Find out whether the provider offers monitoring, optimisation, troubleshooting and ongoing support after go-live.

Dynamics 365 Cloud Migration Services

For organisations running Microsoft Dynamics 365 or legacy Dynamics applications, cloud migration can involve more than moving technical infrastructure. Business processes, data, integrations, customisations, reporting and user roles also need to be considered.

Dynamics 365 cloud migration services can include assessment, migration planning, data migration, application upgrades, implementation, integration and post-migration support.

For example, businesses moving from legacy ERP systems to Microsoft Dynamics 365 Business Central may need to plan historical data migration, financial processes, inventory, purchasing, sales, reporting and integrations as part of the transition.

Similarly, organisations moving from older Dynamics platforms to modern Dynamics 365 applications should assess customisations and integrations before deciding whether to migrate, replace or redesign individual components.

Dynamics Square UK can help businesses assess their existing Dynamics environment and identify an appropriate migration or modernisation approach based on their requirements.

Cloud Migration Checklist

Before starting a cloud migration project, use the following checklist:

• Define clear business objectives

• Inventory applications, servers and data

• Identify workload dependencies

• Assess cloud readiness

• Classify workloads by migration approach

• Estimate migration and ongoing cloud costs

• Define security and governance requirements

• Prepare the target cloud environment

• Create a migration roadmap

• Plan migration waves

• Back up critical data

• Test migrated workloads

• Prepare the cutover plan

• Validate business processes after migration

• Monitor and optimise the environment after go-live

How Dynamics Square UK Can Help With Cloud Migration

Dynamics Square UK is a Microsoft Solutions Partner that provides Microsoft technology consulting, implementation, migration, upgrade and support services for businesses.

Our approach can begin with understanding your existing environment and business objectives before defining the appropriate migration roadmap. Depending on your requirements, this may include cloud assessment, migration planning, data migration, application migration, Dynamics 365 migration, Business Central migration, integration and post-migration support.

Dynamics Square UK can help you plan a migration that considers business continuity, data, integrations, security, users and long-term scalability rather than treating migration as a simple transfer of systems.

To discuss your cloud migration requirements, contact Dynamics Square UK and speak with our team about your migration goals.

Final Thoughts

Cloud migration can help businesses modernise their technology environment, improve scalability and reduce dependence on traditional infrastructure. However, the outcome depends heavily on how the migration is planned and executed.

The right approach starts with understanding the existing environment, defining business objectives and selecting an appropriate migration strategy for each workload. Businesses should also plan for security, testing, data integrity, user adoption and ongoing optimisation.

Whether you are moving from on-premises infrastructure, consolidating cloud environments or planning Dynamics 365 cloud migration services, choosing the right strategy and migration partner can make the transition more structured and manageable.

Ready to plan your cloud migration? Contact Dynamics Square UK to discuss your requirements with our cloud and Microsoft technology specialists.