Active Directory is the identity foundation most organizations run on, and when it needs to move, the consequences of a failed cutover are visible to every user. LeadThem Consulting has specialized in Active Directory and Entra ID migrations since 2005. We use Quest Migrator Pro for Active Directory and Quest On Demand Migration (ODM) to handle cross-forest consolidations, Entra ID transitions, and domain restructures with full coexistence and no user-impacting outages.
All of our resources are Quest Certified. Every consultant who works on your migration has been trained and certified by Quest on the tools that move your identity infrastructure.
Migrator Pro for AD and ODM are components of Quest Secure Migration within the Quest Security Management Platform. The platform's second solution, Quest Identity Security and Resilience, covers the recovery and threat-detection products LeadThem operates for clients who need ongoing protection of the AD and Entra ID environment after the cutover, including Quest Identity Recovery and Quest Identity Defense.
Cross-forest migrations are the most demanding AD scenario, and the most common driver is a merger or acquisition that leaves two separate forests that need to become one. LeadThem plans and executes the full lifecycle: domain assessment, object mapping, SID history preservation, coexistence trust configuration, workstation re-targeting, group policy migration, and cutover validation. Users retain access to their workstations and resources throughout the migration; the source environment stays live until the cutover is complete. We run migrations during business hours so your IT team is available if anything needs attention, and we do not require open inbound firewall ports.
Intra-forest restructures and resource forest models are also within scope. If your organization is reorganizing domain architecture without crossing a forest boundary, the planning process is different but the discipline is the same.
The path from on-premises Active Directory to Entra ID (formerly Azure AD) varies by organization. Some are moving to a hybrid model, keeping AD on-premises while extending identity to Entra. Others are targeting a cloud-only Entra ID environment with full on-premises AD decommissioning. Both scenarios require more than a directory sync: Entra hybrid join states, Conditional Access policy alignment, MFA registration continuity, and device migration all need to be planned before the first object moves.
LeadThem uses Quest On Demand Migration to migrate devices, users, and groups to Entra ID while preserving your Conditional Access policies and MFA registration state. For organizations pursuing cloud-only Entra ID, we include an AD decommissioning plan as part of the engagement so the post-migration state is clean and the on-premises infrastructure can actually be retired.
Quest Migrator Pro for Active Directory is the purpose-built tool for AD cross-forest migrations. It automates SID history cloning, group policy migration, workstation re-targeting, and trust management in a single coordinated workflow. LeadThem has been deploying this tool since its early versions, and as a Quest Software partner since 2005 we have direct access to Quest engineering when edge cases surface. You are not waiting on a support ticket.
For Entra ID and hybrid identity work, Quest On Demand Migration handles device migrations, user and group provisioning, and Conditional Access continuity. The two tools cover the full AD-to-Entra ID migration lifecycle without requiring you to coordinate between vendors.
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