Oct 30th, 2026
Azure Migration Assessment: What Should Be Reviewed Before You Migrate?
Moving workloads to Azure isn’t simply about transferring existing servers and applications to the cloud. Application dependencies, infrastructure utilization, database compatibility, network connectivity, security controls, performance requirements, and licensing assumptions can all affect migration readiness and cost.
An Azure migration assessment examines the applications, virtual machines, databases, storage, dependencies, network configuration, security requirements, and operational processes to provide a technical view of the environment before migration and to identify compatibility issues and migration blockers.
The assessment also helps determine whether workloads are better suited for rehosting, replatforming, refactoring, rearchitecting, replacement, retirement, or retention. This gives technical and business teams the information needed to prioritize workloads, address remediation requirements, estimate costs, and build a practical Azure migration roadmap.
What Is an Azure Migration Assessment?
A migration assessment is a structured analysis of an organization’s applications, architecture, infrastructure, data, dependencies, security requirements, and environment in preparation for migration to Azure.
The assessment typically examines:
- Applications and workloads
- Infrastructure utilization
- Application dependencies
- Databases and data
- Network connectivity
- Security and compliance
- Performance and availability
- Migration and operating costs
Azure Migrate and similar tools can help by evaluating Azure readiness, suggesting appropriately sized targets, and estimating monthly Azure costs.
The evaluation should consider business criticality, application architecture, compliance requirements, and modernization goals to decide the appropriate migration option for each workload.
What Should You Review During an Azure Migration Assessment?
A proper migration assessment should look beyond the infrastructure being moved by examining applications, dependencies, data, network, security, and operational requirements that can affect migration readiness, cost, and execution.
Applications, Infrastructure, and Dependencies
Start with an inventory of applications, servers, virtual machines, databases, storage, middleware, and supporting services. Then review CPU, memory, storage, IOPS, and network utilization to understand actual workload behavior and support right-sizing.
Microsoft notes that performance-based Azure Migrate assessments use CPU, memory, disk IOPS, and throughput data to recommend target resources. Dependency mapping is also important because applications may rely on databases, APIs, authentication services, or file shares.
Our digital transformation services include infrastructure assessment and dependency analysis to support this planning.
Data, Databases, and Network
Data and database readiness can influence both the migration approach and the Microsoft Azure services selected. Review data volume and growth, database engines and versions, compatibility requirements, backup and recovery, RPO and RTO, data residency, downtime tolerance, and network readiness.
Review bandwidth, latency, DNS, firewall rules, IP addresses, VPNs, ExpressRoute, and hybrid connectivity to spot any network or data issues that could affect migration.
Security, Compliance, and Operations
Evaluate security and compliance issues before migration because they can influence the Azure architecture for the migrated workloads. Evaluate issues such as identity and access management, encryption, secrets management, network security, data classification, compliance requirements, auditing requirements, and operational readiness.
Consider monitoring, logging, backup and disaster recovery strategy, patching, access management, and support options. Teams need to know how workloads will be secured and operated after migration, not only how they will be migrated.
Our Microsoft Azure solutions help organizations address cloud migration alongside application and modernization requirements.
What Should Be Fixed Before You Migrate to Azure?
An assessment will often identify issues that need attention before migration, including unsupported operating systems, outdated runtimes, legacy database versions, excessive permissions, exposed services, overprovisioned resources, tightly coupled applications, and missing monitoring or recovery processes.
Not every issue needs to delay migration, so a practical assessment should separate findings into:
- Migration blockers: Issues that must be resolved before the workload can move.
- Pre-migration remediation: Issues that should be addressed to reduce migration or operational risk.
- Post-migration optimization: Improvements that can be handled after the workload is stable in Azure.
This distinction helps teams avoid unnecessary migration delays while still addressing issues that could cause failures or security problems. For workloads with significant technical debt, Telliant’s legacy application modernization services can also apply when migration reveals a need for refactoring, rearchitecting, or other application-level changes.
How Does the Assessment Help Choose the Right Migration Approach?
Not every workload should follow the same migration path, so assessment findings can help determine whether to rehost, replatform, refactor, rearchitect, replace, retire, or retain each workload.
- For stable workloads: A stable application with limited compatibility issues may be suitable for rehosting, while a workload that can benefit from managed Azure services without major architectural changes may be better suited to replatforming.
- For workloads that need modernization: Applications with outdated architecture, scalability limitations, or significant technical debt may require refactoring or rearchitecting.
- For workloads with limited business value: In some cases, the assessment may show that an application has limited business value and should be retired instead of migrating.
The key takeaway: The migration strategy should come from the assessment findings, not be decided before you fully understand the workload.
What Does an Azure Migration Assessment Tell You About Cost and Risk?
Migration cost should cover more than the expected Azure infrastructure bill and include one-time expenses such as application remediation, migration engineering, testing, data transfer, and cutover activities.
It should also consider ongoing Azure costs, such as:
- Compute
- Storage
- Databases
- Networking
- Backup and disaster recovery
- Security
- Monitoring
- Licensing and support
Azure Migrate can calculate estimated monthly Azure costs after right-sizing, but those estimates depend on assessment settings and factors such as workload sizing, pricing, and licensing assumptions.
Evaluate risk alongside cost, as dependency failures, downtime, compatibility issues, performance problems, security gaps, and unexpected resource consumption can all change the business case.
Which Companies Offer Azure Migration Assessment Services?
Enterprises can choose from custom software development partners that offer Azure migration, assessment, and application modernization services.
1. Telliant Systems
Provides custom software engineering, Azure solutions, application modernization, and cloud migration services, helping organizations assess existing applications and plan their transition to Azure.
2. BairesDev
Provides customized software development, cloud computing applications, DevOps, and Microsoft Azure services, assisting organizations in software engineering and cloud computing projects.
3. Fingent
Provides custom application development, cloud development, enterprise application development, and legacy system modernization, including cloud migration support.
4. Appinventiv
Offers custom software development and digital engineering services, helping organizations with application development, modernization, and technology transformation.
5. ScienceSoft
Combines custom software development with cloud consulting, application modernization, and migration services for enterprise applications.
6. Simform
Provides software engineering and product development services and offers capabilities in cloud computing, application modernization, and digital engineering.
7. VLink
Offers custom software development and digital transformation services, helping organizations with application development, modernization, and cloud initiatives.
8. Belitsoft
Offers custom software development, legacy application modernization, and cloud migration to help businesses with complex application environments.
When comparing providers, enterprises should assess how well they turn findings into migration decisions, priorities, and an actionable roadmap.
How Can Telliant Help with Azure Migration Assessment?
Our migration assessment approach looks at both the cloud environment and the applications running within it. This helps enterprises identify what is ready to move, what needs attention, and how to handle each workload.
The process can help organizations:
- Assess applications and infrastructure
- Identify workload dependencies and readiness gaps
- Review technology compatibility and technical debt
- Evaluate migration and modernization requirements
- Determine the appropriate migration approach
- Consider Azure architecture and cost requirements
- Prioritize workloads for migration
- Build a practical migration roadmap
A look at our work:
Our Cloud-Based BI Platform case study demonstrates how an Azure-based modernization effort addressed application performance and scalability requirements. The engagement used Azure, .NET, SQL, Angular, and LDAP, resulting in an 80% performance improvement and support for 100% concurrent multi-user access.
Conclusion
An Azure migration assessment gives enterprises a clearer view of what stands between their current environment and a successful move to Azure. It helps identify dependencies, compatibility issues, security gaps, costs, and operational requirements before they become migration problems.
More importantly, the assessment should lead to decisions: what to migrate, what to fix, what to modernize, what to retire, and what to migrate first. With the right custom software development expertise, organizations can approach Azure migration with a practical roadmap rather than relying on assumptions about their existing environment.
