Gartner Research

Migration Considerations for Active Directory

Published: 24 October 2014

ID: G00269442

Analyst(s): Kevin Kampman , Nick Nikols


Organizational changes such as mergers and acquisitions impact the overall structure of Active Directory deployments, and the end of support for Windows Server 2003 and the advent of Microsoft Office 365 are influencing decisions about AD structure.

Table Of Contents


  • What Do AD Deployments Look Like?
    • Directory Structure and Components
    • Existing Deployments
  • What Conditions May Lead to Restructuring AD?
  • What Are the Alternatives?
    • Maintain the Existing Environment
    • Assimilate the Organization
    • Create a Consolidated Directory
    • Employ a Virtual Directory
    • Migrate Domains
  • Strengths
  • Weaknesses


  • Why Be Concerned About Migrations?
  • Who Is Involved in a Directory Migration?
  • What Needs to Be Communicated, to Whom?
  • When Do Migrations Take Place?
  • How Long Does a Migration Take?

The Details

  • Why Is an AD Migration Different From a Regular Directory Migration?
  • How Do We Conduct a Domain Migration?
    • What Components Affect a Migration?
    • What Data Requires Special Handling?
    • What Tools Are Available?
  • What Is the Domain Migration Process?
  • The Importance of Planning and Testing

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