“Move everything to the cloud” sounds simple. In reality, cloud migration is a business and technology decision that should be based on your applications, data, users, security requirements and long-term plans.
Cloud is a tool, not a strategy by itself.
The right question is not “Should everything move to the cloud?” but “Which services benefit from cloud delivery, and what is the safest, most practical way to get there?”
Why do businesses move to the cloud?
Cloud services can provide access to computing, storage, applications and collaboration tools without requiring every organisation to own and maintain all of the underlying infrastructure itself.
For a growing business, the attraction may be flexibility, remote access, easier collaboration, reduced dependence on local hardware or a simpler way to support changing workloads.
6 signs your business may benefit from cloud services
1. Your team needs to work from anywhere
If employees work from home, across multiple offices or while travelling, cloud-based services can make collaboration and access easier when they are designed and secured correctly.
2. Your local infrastructure is becoming difficult to manage
Servers, storage and networking hardware can require maintenance, replacement planning, space and technical expertise. Cloud services can change how those responsibilities are handled.
3. Your business is growing quickly
New users, new locations and changing workloads can create pressure on existing infrastructure. Some cloud services provide more flexible ways to scale than fixed local capacity.
4. You want easier access to modern applications
Many business applications are now delivered as cloud services. Microsoft 365 is one familiar example where email, collaboration and productivity tools are delivered through an online service rather than a traditional on-premises application stack.
5. You are planning a new office or major IT refresh
A move to a new location or a significant infrastructure replacement can be a useful point to reconsider whether every system needs to remain on-site.
6. Remote access is becoming too complicated
If staff regularly need access to files or systems outside the office, cloud services can sometimes reduce the complexity of traditional remote-access arrangements.
Reasons not to move everything to the cloud
Cloud is not automatically cheaper, simpler or better for every workload. Some businesses may have technical, regulatory, connectivity or application requirements that make a hybrid or on-premises approach more appropriate.
- Legacy applications may depend on local infrastructure.
- Some workloads may not be economically attractive to migrate.
- Connectivity requirements may be significant.
- Data handling or compliance requirements may affect architecture.
- Cloud costs can become difficult to control without proper governance.
- Migration itself can introduce operational risk if poorly planned.
Public cloud, private cloud or hybrid?
The cloud is not one single model. A business may use public cloud services, private environments, software-as-a-service applications, or a combination of cloud and on-premises infrastructure.
A hybrid approach can make sense when some workloads are ready for cloud delivery while others still have valid reasons to remain on local infrastructure.
Which workloads should your business move first?
Assess each workload individually before committing to a cloud project. These are starting points, not automatic recommendations.
| Workload | Possible approach | What to check first |
|---|---|---|
| Email and collaboration | Cloud service such as Microsoft 365 | Identity security, licensing, retention and access |
| Shared business files | Cloud storage or hybrid file services | Permissions, external sharing, data volume and recovery |
| Legacy accounting application | Retain locally or replace with SaaS | Vendor support, compatibility, integrations and costs |
| Business website | Managed hosting or cloud platform | Availability, dependencies, security and hosting |
| Backup and disaster recovery | Cloud-based or hybrid backup | Recovery time, recovery point, retention and restore tests |
| Specialist production system | Retain, modernise or assess for migration | Equipment dependencies, latency and supplier support |
Classify each workload as migrate, modernise, replace, retain or retire. Record the reason and who approves the decision.
What about cost?
Cost should be evaluated as a total business cost, not simply as a comparison between a cloud invoice and a server purchase.
Consider licensing, storage, compute, support, connectivity, backup, security, migration work and the time your own team spends managing the environment.
Cloud services can also be easier to scale, but that flexibility needs governance. Unused resources, duplicated services and poor configuration can create unnecessary spending.
Example: comparing three-year IT costs
Consider a hypothetical 20-person business with an ageing on-premises file server. These figures are illustrative assumptions only, not supplier quotes or typical market prices.
| Cost over three years | Keep server | Cloud option |
|---|---|---|
| Hardware or replacement allowance | £3,000 | £0 |
| Storage and service charges | £900 | £3,600 |
| Backup and recovery | £1,800 | £1,080 |
| Migration and initial setup | £0 | £1,500 |
| Internal administration | £3,120 | £1,560 |
| Illustrative three-year total | £8,820 | £7,740 |
In this hypothetical scenario, the cloud option costs £1,080 less over three years. The result depends on actual storage use, subscription prices, backup design, staff time and whether hardware needs replacing.
This comparison excludes potential downtime, connectivity changes, tax treatment and application redevelopment. Compare both options over the same period, including licensing, support, security, backup, migration, connectivity and ongoing administration.
Decision point: cloud may still be worthwhile if it costs more but delivers measurable improvements in resilience or flexibility. If the business case is weak, retaining the current system or using a hybrid approach may be more appropriate.
Is the cloud secure?
Security depends on the service, configuration, identity controls, data handling and how the business uses the platform. Moving a workload to the cloud does not remove the need for good security practices.
Important areas include identity and MFA, least-privilege access, device security, data protection, backup and recovery, monitoring and user awareness.
How should you approach a cloud migration?
- Inventory your systems, applications and data.
- Identify the business-critical workloads.
- Understand dependencies and technical constraints.
- Choose the right cloud service model for each workload.
- Review security, identity, backup and recovery requirements.
- Estimate ongoing costs and define ownership.
- Test the migration plan before moving critical workloads.
- Document the new environment and monitor it after migration.
Worked example: moving a shared file server to the cloud
Imagine a 20-person company whose staff store documents on an office server. Remote access is difficult and the server is approaching replacement age. A sensible migration starts with discovery—not immediately copying every file.
- Assess the environment. Identify data volume, folder permissions, duplicate files, sensitive records, application dependencies and data owners.
- Choose the destination. Compare cloud storage, managed file services and hybrid options. Check permissions, sharing, retention and recovery.
- Secure it. Configure MFA, least-privilege access, administrator protections and sharing restrictions. Decide who manages security and reviews access.
- Pilot with a small group. Move representative non-critical files first. Test access, file integrity, permissions, synchronisation and recovery.
- Plan cutover and rollback. Agree a migration window, communicate with staff, verify data and retain a controlled rollback option until acceptance.
- Review after migration. Monitor access logs, storage growth, backup and recovery, and ongoing costs. Retire old services only when they are no longer needed.
The exact process depends on the platform and the business's technical and regulatory requirements. The aim is to discover dependencies before they become migration problems.
Don't forget Microsoft 365
Many businesses start their cloud journey with Microsoft 365 rather than a large infrastructure migration. That means good Microsoft 365 security and administration should be part of the wider cloud strategy.
For more guidance, read: 5 Microsoft 365 Security Settings Every Business Should Check .
A workload-by-workload migration mindset
NorthWave recommends treating cloud migration as a sequence of business decisions rather than a single technology project. Start with the workload, its users, dependencies, data, security requirements and desired outcome. Then decide whether it should be migrated, modernised, replaced or retained locally.
This approach also makes cost and risk easier to understand. A migration plan should account for identity, connectivity, backup, monitoring, licensing, support and recovery—not just the target cloud service. Microsoft's Cloud Adoption Framework similarly places strategy, planning, readiness, migration, governance, security and management around the cloud journey.
NorthWave practical check
Before approving a migration, document the current workload, dependencies, recovery method, security controls, expected business benefit and ongoing cost. If any of those are unknown, more discovery is needed before moving a critical system.
Further reading
These authoritative resources provide additional guidance. Check current documentation and service requirements before planning a migration.
- Microsoft Learn — Select your cloud migration strategy
Guidance on deciding whether to migrate, modernise, replace, retain or retire a workload.
- Microsoft Learn — Cloud Adoption Framework
Framework covering strategy, planning, readiness, migration, governance, security and management.
- National Cyber Security Centre — Cloud security guidance
UK guidance for selecting, configuring and using cloud services securely.
Final thoughts
The best cloud strategy is the one that fits your business. Some organisations will benefit from moving significant workloads to cloud platforms. Others will be better served by a hybrid model.
Before migrating, understand the problem you are trying to solve, the outcomes you need and the technology dependencies you cannot ignore.
Take the next step
Not sure whether cloud is right for your business?
NorthWave can help you assess your current infrastructure, identify suitable workloads and plan a practical cloud or hybrid approach.