Migrating Active Directory Domain Services to Windows Server 2025

Upgrading your identity infrastructure is critical for maintaining security and performance in modern IT environments. This comprehensive text-based course walks you through the essential concepts and strategic steps needed to transition your domain controllers to Windows Server 2025. You will gain the confidence to plan, execute, and validate a seamless Active Directory Domain Services (AD DS) migration. By understanding the underlying directory architecture and pre-requisites, you can minimize downtime and prevent common configuration errors during the upgrade process. What you'll learn: Understand foundational Active Directory Domain Services concepts and migration terminology; Assess environment readiness and prepare functional levels for upgrading; Configure and deploy new domain controllers running Windows Server 2025; Migrate operations master roles and decommission legacy domain controllers safely; Apply modern security hardening practices and database optimizations, including new page-size features; Troubleshoot replication issues and validate directory health using command-line tools. The course begins with core directory concepts and pre-migration planning before guiding you through step-by-step written deployment scenarios, role transfers, and final environment cleanup. This course is designed for junior system administrators, IT support professionals, and beginners looking to understand modern identity migration workflows. No prior migration experience is required, though basic familiarity with networking concepts is helpful. Start reading today to master the fundamentals of modern Active Directory infrastructure upgrades.