Cloud Migration2025-09-03CloudSwift Engineering

Lessons From a Multi-Region Active Directory Migration

Context

Large directory estates fail migrations when cutover planning is vague.

What worked

  • Native Microsoft tooling over DIY scripts where possible
  • Region-by-region pilots before global cutover
  • Clear rollback criteria and communication windows
  • Post-migration Group Policy cleanup as a deliberate phase

Takeaway

Treat identity as a program, not a weekend project — especially across 10+ regions.

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