Cloud migration: secure and accelerate your transition to Azure, AWS or Google Cloud

Cloud migration involves moving all or part of an information system (servers, applications, data, collaborative tools and databases) to public, private or hybrid Cloud infrastructures, and is now a strategic lever for performance and digital transformation. By migrating to the Cloud, companies gain in flexibility, agility and scalability: resources automatically adapt to load, infrastructure costs are reduced, and services become accessible anywhere, anytime. This modernization also enhances security through centralized policies and automated updates, while promoting disaster resilience through high availability and integrated backup mechanisms.

There are several approaches, depending on the desired level of transformation:

• Lift & Shift: transfer applications and data "as is" to the Cloud, without modifying any code. This is the fastest and least intrusive method.
• Replatforming: adapting certain technical bricks (databases, middleware, web services) to take advantage of the benefits of the Cloud (scalability, managed storage, native security).
• Refactoring: complete redesign of applications to make them "Cloud Native" - containerized, orchestrated (Kubernetes, Docker) and compatible with serverless architectures.
  At IT Systèmes, we define the strategy best suited to your context, objectives and Cloud maturity, to achieve the best balance between cost, performance and agility.

Migration to Azure or AWS follows a rigorous process:

1. Audit and scoping to analyze servers, application dependencies and security constraints.
2. Definition of target architecture integrating performance, availability (SLA) and compliance requirements.
3. Pilot phase on a limited perimeter to validate compatibility and performance.
4. Progressive or Big Bang migration, depending on the strategy defined, with real-time supervision.
5. Validation, load testing and post-migration optimization.
   IT Systèmes uses replication and automation tools such as FlexFlow to orchestrate transfers, synchronize data seamlessly and guarantee uninterrupted migration, even for mission-critical environments.

Not necessarily. Thanks to continuous synchronization and duplication of environments, we can ensure migration without any visible interruption to users. A gradual migration, synchronizing flows between local servers and the Cloud, guaranteeing data consistency and service continuity, is possible. When a final switchover is required (Big Bang migration), it is scheduled during non-working hours (NOW), evenings or weekends, to avoid any operational disruption. This approach guarantees constant application availability, even during critical project phases.

During a merger, acquisition or organizational change, it is often necessary to migrate a Microsoft 365 / Azure tenant. This involves transferring all users, licenses, groups, mailboxes, OneDrive, SharePoint, Teams and Azure resources from one environment to another, a sensitive operation as it impacts messaging, collaboration and user access. IT Systèmes masters this type of migration thanks to automated tools and FlexFlow synchronization, which maintains consistency between the two tenants until the switchover is complete.We guarantee the preservation of access rights, metadata, historical data and RGPD compliance, without any interruption of service.

Security is integrated into every stage of the project. We apply flow encryption protocols (TLS, SSL, AES-256) and implement multi-factor authentication (MFA), centralized identity management (IAM) and strict network segmentation. Each migration is supervised in real time, with automatic alerts and audit logs to guarantee full traceability. Sensitive data is transferred via secure tunnels (VPN IPsec, ExpressRoute), and configurations comply with ISO 27001, NIS2 and RGPD standards. IT Systèmes also implements incremental backups and a disaster recovery plan (DRP) tested before the switchover, to eliminate any risk of data loss.

Yes, in many cases this is the recommended approach. This is known as hybrid cloud, combining local (on-premise) and cloud resources.
This strategy enables certain critical or sensitive applications to be kept in-house, while taking advantage of the benefits of the cloud for other services.
IT Systèmes designs coherent hybrid architectures, with secure interconnections and automated synchronization between environments.
This gradual approach enables the transition to be tested, validated and controlled, while maintaining regulatory compliance and data sovereignty.

The advantages are many:

• Flexibility and agility: Cloud resources adjust dynamically to load.
• Cost reduction: shift from CAPEX to OPEX model, without immobilizing equipment.
• Enhanced security: centralized authentication, encryption and native supervision.
• Business continuity: rapid recovery in the event of an incident thanks to integrated backups and DRP.
• Accelerated innovation: easier integration of AI, data and automation solutions.
  Successful migration transforms infrastructure into a sustainable competitive lever.

Our mission doesn't end with the switchover. We provide ongoing monitoring of your environments via our service center, incident management, performance optimization and the implementation of FinOps best practices to reduce Cloud costs.
We also offer training for your IT teams, consumption reports and optimization recommendations.
Thanks to this proactive approach, your Cloud remains efficient, secure and adapted to the evolution of your business.

Because we have over 15 years' experience, with a large number of cloud and hybrid migrations to our credit.
Our certified engineers design high-performance architectures, supervise the migration from end to end, and guarantee a seamless switchover thanks to ourcontinuous orchestration and synchronization tool.
We combine methodology, security and human support to guarantee a successful, sustainable transition that meets your business requirements.