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Cloud Infrastructure & Modernisation
Moving from On-Prem Servers to the Cloud: The Guide and Checklist
In this guide:
- What moving from on-prem servers to the cloud means
- Why businesses move away from on-prem servers
- How to assess your current infrastructure before migration
- Common challenges when moving to the cloud
- What a successful cloud migration looks like
- How to prepare for migration and reduce risk
- What to check after migration is complete
- How IT Desk can help with cloud migration and ongoing support
TL;DR
Moving from on-prem servers to the cloud can improve flexibility, resilience, scalability and remote access, but it needs careful planning. Businesses should assess workloads, dependencies, security, backups, costs and user impact before migrating to platforms such as Microsoft Azure.
Key Takeaways
On-prem to cloud migration should start with discovery and assessment, not immediate migration.
Not every workload should move in the same way; some may be lifted, modernised, replaced or kept hybrid.
Dependency mapping is important because applications, databases, users and services often rely on each other.
Security, identity, access control, backups and disaster recovery should be planned before migration.
Testing and rollback planning help reduce disruption during the migration process.
After migration, businesses should monitor performance, costs, security and user experience.
IT Desk can help businesses plan, migrate, secure and manage cloud environments.
Security and resilience considerations
Cloud platforms provide strong foundations, but configuration matters.
Key areas to address:
Identity and access management
Network segmentation and firewalls
Monitoring and logging
Backup beyond default cloud protections
Power, hardware, and downtime reduction
One major benefit of cloud migration is reduced exposure to:
Local power outages
Hardware failures
Cooling and environmental issues
However, local risks don’t disappear entirely.
Businesses should still consider:
UPS devices for remaining on-prem equipment
Redundant internet connections
Clear failover and recovery procedures
Cloud reduces downtime risk — it doesn’t eliminate the need for planning.
Example cloud migration scenario
A multi-site organisation relied on on-prem servers hosted at head office. Power issues and ageing hardware led to repeated outages.
By migrating core workloads to the cloud:
Resilience improved
Site-to-site dependencies were reduced
Recovery times shortened significantly
On-prem hardware was simplified
The migration reduced both downtime and long-term infrastructure risk.
Is moving to the cloud right for every business?
Not always.
Some systems may:
Require low-latency local access
Depend on legacy software
Be constrained by regulation
For most organisations, a hybrid or phased approach delivers the best balance.
People Also Ask
What does on-prem to cloud migration mean?
On-prem to cloud migration means moving servers, applications, data or workloads from physical infrastructure owned or managed by the business into a cloud environment such as Microsoft Azure. It can involve moving virtual machines, databases, file storage, applications or backup systems.
What should be assessed before moving servers to the cloud?
Before moving servers to the cloud, businesses should assess current infrastructure, applications, databases, dependencies, users, storage, performance, security, backups, compliance requirements and costs. This helps determine which workloads should move first and which migration approach is most suitable.
Is moving to the cloud always the right choice?
Not always. Cloud migration can provide flexibility, scalability and resilience, but some workloads may need to stay on-premise or use a hybrid model because of performance, compliance, cost or application requirements. A readiness assessment helps decide the right approach.
What are the risks of moving from on-prem servers to the cloud?
Common risks include poor planning, unexpected costs, application disruption, data migration issues, security misconfiguration, downtime, weak backup planning and user access problems. These risks can be reduced through assessment, testing, sequencing and clear migration planning.
How long does an on-prem to cloud migration take?
The time needed depends on the number of servers, application complexity, data volume, dependencies, internet connectivity, migration method and testing requirements. Small migrations may be completed quickly, while more complex environments usually need phased planning and careful validation.
Can IT Desk help move on-prem servers to the cloud?
Yes. IT Desk can help businesses assess on-prem servers, plan cloud migration, move workloads to Microsoft Azure, configure cloud security, manage backups and provide ongoing support after migration.
Need help planning an on-prem to cloud migration?
IT Desk helps businesses assess existing servers, applications, data, dependencies and security requirements before moving to the cloud. We can help plan the right migration approach, reduce disruption and provide ongoing support for Microsoft Azure, cloud backups and cloud management.
What does “moving to the cloud” actually mean?
Moving from on-prem servers to the cloud means shifting workloads that are hosted and maintained locally — such as file servers, application servers, and databases — to cloud-based platforms.
This might include:
Software-as-a-Service (SaaS) platforms
Hybrid environments combining cloud and on-prem systems
For most businesses, the move is incremental, not all-or-nothing.
Why businesses move away from on-prem servers
Traditional on-prem servers can still work well, but they come with increasing challenges.
Common drivers for cloud migration include:
Ageing or end-of-life server hardware
Rising maintenance and support costs
Limited resilience and redundancy
Remote and hybrid working requirements
Difficulty scaling infrastructure
Power, cooling, and space constraints
Cloud migration is often triggered by a server refresh decision rather than a desire for “the cloud” itself.
How cloud infrastructure differs from on-prem servers
Understanding this difference is critical to a successful migration.
On-prem servers
Hardware owned and maintained locally
Single physical location
Power, cooling, and backup responsibility sits with the business
Fixed capacity unless upgraded
Cloud infrastructure
Hosted in resilient data centres
Built-in redundancy and availability options
Consumption-based pricing
Scales up or down as needed
Cloud reduces many physical risks, but requires careful design to avoid cost and security issues.
Common challenges when moving to the cloud
Most issues arise from poor planning rather than cloud technology itself.
Typical challenges include:
Migrating unsuitable legacy applications
Underestimating data transfer and dependencies
Poor identity and access design
Unexpected running costs
Lack of clarity over ownership and responsibility
Assuming cloud equals “hands off” management
A cloud environment still needs active management.
What a successful cloud migration looks like
Well-executed migrations typically result in:
Improved resilience and uptime
Reduced dependency on physical infrastructure
Better support for remote work
Clearer security controls
Predictable disaster recovery options
The goal is improved reliability and flexibility, not just a new hosting location.
Pre-migration checklist (before moving anything)
This stage determines success or failure.
✔ Identify which servers and workloads are suitable for cloud
✔ Assess application compatibility and dependencies
✔ Review data sensitivity and compliance requirements
✔ Design identity, access, and security controls
✔ Decide on cloud vs SaaS alternatives
✔ Confirm backup, recovery, and retention requirements
✔ Estimate ongoing cloud costs
✔ Define migration phases and success criteria
Migrating everything “as is” rarely delivers the expected benefits.
Migration approaches: how businesses typically move
There is no single correct approach.
Common strategies include:
Lift and shift (move first, optimise later)
Re-platforming (minor changes for cloud compatibility)
Re-architecting (redesign for cloud-native services)
Hybrid models (some systems remain on-prem)
The right choice depends on risk, complexity, and business priorities.
Post-migration checklist (after the move)
Once workloads are live in the cloud:
✔ Validate performance and availability
✔ Confirm backups and disaster recovery
✔ Review security and access permissions
✔ Monitor costs and usage
✔ Update documentation and procedures
✔ Restrict or decommission on-prem servers
✔ Review business continuity plans
Leaving legacy servers running unnecessarily often introduces confusion and risk.
Choosing the right migration approach
Moving from on-prem servers to the cloud is not always a simple lift-and-shift project. Some workloads can be moved with minimal change, while others may need to be reconfigured, modernised, replaced with a cloud service or kept in a hybrid setup.
Before migrating, businesses should review:
- Which servers, applications and databases are currently in use
- How systems depend on each other
- Which workloads are business-critical
- Current storage, backup and recovery requirements
- Security, compliance and access requirements
- Performance needs and expected cloud costs
- Whether Microsoft Azure, Microsoft 365, SaaS tools or a hybrid approach is the best fit
The right approach should reduce disruption, protect data and make sure the cloud environment supports the way the business actually works.
Written by:
Steve Harper
Commercial Director
Need help planning an on-prem to cloud migration?
IT Desk helps businesses assess existing servers, applications, data, dependencies and security requirements before moving to the cloud. We can help plan the right migration approach, reduce disruption and provide ongoing support for Microsoft Azure, cloud backups and cloud management.
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