Migration Plan for Active Directory from Windows Server 2012 R2 to 2025 Datacenter
The migration involves retiring a Windows Server 2012 R2 VM and establishing a new Windows Server 2025 Datacenter VM as a domain controller. The process includes replicating Active Directory, transferring FSMO roles, and ensuring minimal user disruption. Key deliverables consist of a detailed execution plan, remote migration using standard tools, final verification of functionalities, and a rollback path.
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The plan is to migrate from a Windows Server 2012 R2 VM to a new Windows Server 2025 Datacenter VM, focusing on a clean migration of Active Directory roles. The migration will include pre-migration health checks, promoting the new domain controller, validating replication, transferring FSMO roles, and performing post-migration cleanup.
The migration will be executed remotely with tools like AD DS Configuration Wizard, PowerShell, and repadmin, ensuring real-time status updates. Final verification will confirm functionality such as logons, Group Policy, and DNS resolution before decommissioning the legacy server. A rollback path and hand-over document will be provided.
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