LeadThem Consulting has been running complex email and identity migrations since 2005. As a long-standing Quest Software partner, we use Quest On Demand Migration (ODM) and Migrator Pro for Active Directory to deliver tenant-to-tenant, on-premises-to-cloud, and cross-forest migrations with zero data loss and minimal user disruption. If your project has a deadline, a compliance requirement, or an acquisition behind it, we have already solved that problem before.
Our migration teams find the hidden dependencies and permission structures that derail in-house projects, before they surface during cutover. We plan the migration end to end, run source and target environments in coexistence for a controlled transition, and validate data fidelity before users are ever moved. The result is a migration that lands on schedule and does not generate a wave of helpdesk tickets the morning after.
ODM and Migrator Pro for Active Directory are components of Quest Secure Migration, one of two solutions in the Quest Security Management Platform. The other solution, Quest Identity Security and Resilience, covers the recovery and threat-detection products LeadThem also operates for clients who need ongoing identity protection after migration.
The most common driver today is a merger, acquisition, or divestiture that leaves two Microsoft 365 tenants that need to become one. Quest On Demand Migration handles Exchange Online, SharePoint Online, OneDrive, Teams, and Entra ID in a single coordinated workflow. LeadThem manages the full project: discovery, mapping, coexistence routing, batch scheduling, and cutover validation. ODM preserves multi-factor authentication, Conditional Access policies, sensitivity labels, retention, and eDiscovery holds through the cutover, so security and compliance posture do not regress on the new tenant.
Whether you are consolidating forests after an acquisition, restructuring domain architecture, or moving from on-premises Active Directory to Entra ID (formerly Azure AD), LeadThem uses Migrator Pro for Active Directory and Quest On Demand Migration to handle cross-forest trusts, SID history preservation, workstation re-targeting, and Entra device migration. We migrate during business hours without requiring open inbound firewall ports or user-impacting outages.
Moving from on-premises Exchange to Exchange Online is more than a mailbox copy. LeadThem manages directory synchronization, mail routing coexistence, calendar and contacts fidelity, public folder migration, and cutover coordination with your IT team. We support both hybrid Exchange and direct cutover scenarios depending on your timeline and risk tolerance.
LeadThem has migrated users off platforms most firms have never touched. Using Quest's Migrator for Notes to Exchange, we move mailboxes, calendars, contacts, and journals from IBM and HCL Notes and Domino to Exchange Online with full fidelity. GroupWise to Exchange Online migrations are available as a specialist engagement. These are not routine projects; they require engineers who understand the source platform's data model, and that is the work LeadThem has been doing since long before Microsoft 365 existed.
Tell us about your migration, and we'll come back with a plan.
Talk to a migration architect