Microsoft 365 Tenant-to-Tenant Migration Services
Seamlessly migrate users, data, and collaboration tools across Microsoft 365 tenants—including Commercial, GCC, GCC High and AirGap environments—with Planet’s proven, phased tenant-to-tenant migration framework.
Understand why organizations migrate Microsoft 365 tenants.
Microsoft 365 tenant-to-tenant migrations aren’t just about moving mailboxes. Changes in organizational structure, cloud strategy, or compliance may require a moving of identity, collaboration, and applications across tenants. In some cases, customers are following legislative mandates. In other cases, there are acquisitions or divestitures that drive migrations. Sometimes, this mean shifting from Commercial to GCC or GCC High or visa versa.
Business Drivers that Require Tenant-to-Tenant Migration
- Consolidation, mergers, acquisitions, or divestitures (MAD)
- Geographic or Regulatory requirements
- Operational efficiency and simplicity
- Aligning Microsoft 365 tenants and data security for Copilot deployment
- Brand or organizational rebranding
- License Optimization
- Compliance requirements (CMMC, NIST 800-171, FedRAMP)
- Moving from other platforms or a 3rd party MSP to Microsoft 365
The Hidden Complexity of Microsoft 365 Tenant Migrations
What seems like a simple mailbox migration often involves technical dependencies, identity shifts, and user disruption—especially in government and regulated environments.
Tenant-to-Tenant migrations involve more than just transferring inboxes.
Organizations must account for identity systems like Microsoft Entra ID, collaboration data in Microsoft Teams and SharePoint, compliance configurations, licensing conflicts, and end-user access. Done poorly, migrations can break access, lose data, or cause confusion across your workforce. For regulated industries and government contractors, these risks carry additional compliance exposure — especially in GCC and GCC High environments.
Tenant-to-Tenant Migration Challenges
- Rebuilding or syncing Microsoft Entra ID and user authentication including Multifactor authentication (MFA)
- Migrating Microsoft Teams, SharePoint Online, OneDrive, and Planner
- Migrating Power Platform (Power Apps, Power Automate) and Power BI while preserving functionality, connectors, and security controls
- Domain name conflicts or consolidation
- Managing active eDiscovery cases in Microsoft Purview, which do not transfer between tenants and require a legal and data continuity strategy
- Security and compliance policy reconfiguration in Microsoft Purview and Defender
- Retaining permissions and metadata during migration
- Business continuity for users during the cutover
- Data sprawl and orphaned content across environments
- Migrating from legacy platforms like Google Workspace or Exchange on-premises
A Proven, Phased Approach to Microsoft 365 Tenant Migrations
Planet Technologies guides every step of the migration journey—from planning and provisioning to secure cutover and post-migration support—minimizing risk and downtime.
Planet's proven M365 tenant migration framework from planning to cutover.
Our process is designed to reduce disruption while ensuring full technical alignment and compliance continuity. Whether you are migrating to Commercial, GCC, GCC High, or other highly secure environments, Planet applies a structured approach tailored to your unique business, licensing, and data needs. Each phase builds toward a secure, well-orchestrated cutover with detailed validation and user readiness checkpoints.
Planet’s Migration Methodology
- Phase 0: Discovery & Planning
- Environment assessment and licensing analysis
- Domain and identity mapping
- Risk mitigation and compliance planning
- Phase I: Provisioning & Access
- Target tenant buildout and access configuration
- Domain setup and Microsoft Entra ID preparation
- Baseline security and compliance setup
- Phase II: Staging & Testing
- Pilot user migrations and content staging
- Microsoft Teams, OneDrive, and SharePoint data validation
- Cutover rehearsal and UAT
- Phase III: Cutover & Decommissioning
- Final mailbox and service cutover
- Post-migration support and training
- Source tenant decommissioning and audit readiness
What to Expect When You Migrate with Planet
Our experienced team delivers secure, low-disruption migrations with clear communication, compliance assurance, and confidence across every workload and user group.
See the secure, mission-ready results Planet delivers with every migration.
At Planet Technologies, we go beyond checklists and toolsets. Our team takes time to understand your organizational mission, constraints, and priorities. Whether you’re a federal agency, government contractor, or mission-driven nonprofit, we tailor our migration strategy to fit your goals — not just your infrastructure. And we don’t stop at cutover.
Through our Evolve 365 program, we provide training, organizational change management, and customized support to help your end users confidently adopt Microsoft 365 tools and sustain long-term success.
Outcomes Our Partners Value
- Secure handoff of Microsoft 365 services and data
- Minimal disruption to daily work during migration
- Maintained or improved compliance posture
- Clear stakeholder communication and planning
- Identity and access continuity across systems
- Support for Microsoft 365 workloads: Exchange, Teams, SharePoint, OneDrive
- Aligned licensing and data architecture to support Microsoft 365 Copilot enablement
- Post-migration support and user readiness
- Expertise across Microsoft 365 environments, including GCC, GCC High, and secure work within DoD, Secret, and Top Secret environments.
Let’s Plan Your Microsoft 365 Tenant Migration
Whether you're consolidating tenants, shifting to GCC High, or migrating from Google Workspace, Planet Technologies is ready to guide your mission—securely and strategically.
Start your tenant migration with a trusted, experienced Microsoft partner.
Every migration is unique. That’s why we begin with a discovery session to understand your environment, your mission needs, and the regulatory frameworks you operate within. From there, we’ll design a right-sized plan for your Microsoft 365 tenant migration — and support your team every step of the way.
Why Organizations Choose Planet
- Microsoft partner with 27+ years of public sector expertise
- Trusted migration advisor for Commercial, GCC, and GCC High
- Proven success with Google Workspace to M365 transitions
- Security, compliance, and CMMC-readiness built-in
- Post-migration support and user enablement through Evolve 365
- Deep understanding of mission-driven environments
Frequently Asked Questions
Timelines vary based on size and complexity, but most projects take several weeks to a few months including planning, testing, and cutover.
Yes. Planet has migrated over 85,000 federal users from Google to Microsoft 365 GCC, including email, Drive, and custom scripts.
Absolutely. We specialize in regulated and government environments and help organizations meet compliance standards like CMMC and FedRAMP.
We minimize disruption through detailed cutover planning, pilot testing, and communication strategies — including optional training via our Evolve 365 program.
Common services include Microsoft Entra ID, Exchange, Teams, SharePoint, OneDrive, and security/compliance settings in Microsoft Purview and Defender.
Yes. Planet provides post-migration support, issue resolution, and long-term adoption and change management through our Evolve 365 program.
Here to Help
Talk with our Microsoft 365 migration experts.
Our Microsoft-certified team is ready to support every phase of your tenant-to-tenant migration — from discovery to post-migration adoption.