Hamilton365 provides end-to-end Microsoft 365 tenant-to-tenant migration services for organisations in Brisbane and across Australia. Migrations are planned and executed by Jamie Hamilton, a senior M365 specialist with deep expertise in Exchange Online, Entra ID, and Microsoft 365 Identity infrastructure, and a decade of enterprise-scale experience managing large, complex M365 environments.
Tenant-to-tenant migrations are among the most technically complex and high-risk projects in the Microsoft 365 ecosystem. Hamilton365 brings the expertise, methodology, and after-hours availability to execute these projects with minimal disruption to business operations.
Business mergers and acquisitions, consolidating two separate Microsoft 365 tenants into one. Business splits and demergers, separating a business unit or entity into its own independent M365 tenant. Rebrands and domain changes, migrating to a new primary domain and Identity across all M365 services. Education and NFP restructures, schools, dioceses, and associations reorganising their M365 environments. MSP or IT provider transitions, moving from a provider-managed tenant to an independently owned tenant.
Comprehensive assessment of both source and target tenants: user counts, mailbox sizes, SharePoint data volumes, Teams configurations, third-party integrations, and custom configurations. Produces a detailed migration scope, risk register, and project timeline.
Migration tooling selection and configuration. Development of the migration runbook, communication plan, and rollback procedures. Licence procurement planning for the target tenant.
Migration of a small pilot group to validate the process, identify issues, and refine the approach before full-scale execution.
Phased migration of users and data in controlled batches, allowing issues to be identified and resolved progressively.
Domain transfer, DNS cutover, final validation of all services in the target tenant, and decommissioning of the source environment.
Monitoring period following cutover to identify and resolve any post-migration issues and confirm all services are operating correctly.
Deep M365 Identity expertise, tenant migrations live or die on Identity management, and this is Hamilton365's core domain. Direct senior specialist engagement, clients work with Jamie Hamilton throughout, not a project manager coordinating junior technicians. After-hours execution capability, cutovers can be scheduled at times that minimise business disruption, not constrained by a 9-to-5 support window. Transparent scoping, every migration is quoted following a proper discovery assessment, with no surprises.
Tenant-to-tenant migrations are quoted on a project basis following a discovery assessment. Cost depends on user count, data volumes, environment complexity, and timeline. Contact Hamilton365 to discuss your specific situation.
Phone: 0403 401 250 | Email: jamie@hamilton365.com.au | hamilton365.com.au
All Services | Microsoft 365 Support | Managed IT Services