Enterprise Application Migration

Enterprise Application Migration – Seamless Transition from AWS to Azure Cloud

Transitioning enterprise applications from AWS to Microsoft Azure is a strategic move that enhances cloud efficiency, strengthens integration with Microsoft technologies, and drives business agility.

Client Background

A leading Enterprise ITSM Product Company serving more than 1,000 live customers worldwide. Their SaaS ITSM application was hosted across six AWS datacenters with multiple environments including Staging, UAT, Production, and DR supporting 2000+ cloud instances.

Business Challenges

Client’s management decided to move workloads from 6 AWS datacenters to 10 newly built Azure datacenters.

Scale of Migration: Over 2000+ cloud instances across multiple environments (Staging, UAT, Production, DR).

Customer Impact: Ensuring seamless migration for 1000+ live customers with zero data loss.

Time Constraint: Migration activities had to be completed within a strict 4-hour scheduled maintenance window.

High Availability & Business Continuity: Applications required HA (High Availability) and LB (Load Balancing) configuration post-migration.

Solution Delivered

A. Cloud Datacenter Design & Build

Architected and deployed 10 Azure datacenters across multiple regions.

Designed infrastructure with High Availability (HA) and Load Balancing (LB).

Automated provisioning and configuration through Terraform and Salt pipelines.

B. Migration Planning & Execution

Built a granular-level Work Breakdown Structure (WBS) for each migration activity.

Defined clear dependencies, rollback strategies, and validation checkpoints.

Executed migrations within planned 4-hour maintenance windows with zero major incidents.

C. Risk Mitigation & Governance

Established parallel run & DR validation for business continuity.

Conducted pre-migration testing and post-migration validations for each environment.

Implemented compliance and security controls aligned with client policies.

Key Highlights

6 AWS datacenters → 10 Azure datacenters successfully migrated.

Terraform + Salt pipeline automation reduced manual effort & error risk.

Granular WBS planning enabled precise execution within SLA.

Delivered a highly resilient & scalable SaaS ITSM platform on Azure.

Business Impact

Seamless migration of 2000+ instances from AWS to Azure.

100% migration success rate within the 4-hour window.

Improved system reliability and scalability leveraging Azure services.

Supported 1000+ live customers with zero downtime beyond maintenance window.

Enhanced HA/DR posture across 10 new Azure datacenters.

Future-ready foundation for cloud cost optimization and expansion.

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