Legacy System Migration is the process of upgrading, modernizing, or replacing outdated, obsolete, or unsupported software systems, applications, or technologies with newer, more efficient, and scalable solutions to address evolving business requirements, technological advancements, or regulatory compliance mandates. Legacy system migration involves assessing legacy applications, identifying migration drivers and constraints, selecting migration approaches (e.g. rehosting, re-platforming, rewriting), refactoring code, migrating data and configurations, testing, and user training to ensure successful transition and adoption of the new system. Legacy system migration helps organizations improve agility, reduce technical debt, enhance productivity, and align IT with business objectives.