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Microsoft 365 · Azure · Tenant-to-tenant
Microsoft 365 and Azure migrations.
Merger, acquisition, end of support for Exchange or your servers: we migrate your users, data and workloads in planned waves, with a pilot, coexistence and hypercare. Your teams keep working throughout the migration.
Free migration assessment.
A conversation with an io4 architect · scope, risks and a realistic timeline.
4,000
users consolidated tenant-to-tenant in 12 weeks, over 4 cutover weekends
1,200
devices moved from SCCM to Intune in 9 months, with Autopilot for every new device
200
servers and 45 applications: Azure migration assessment and architecture for a major Quebec city
15
subsidiaries worldwide migrated tenant-to-tenant into the parent company's tenant
Types of Microsoft 365 and Azure migration.
The same architects cover Microsoft 365, Azure, endpoints and identity. A migration always touches several of these layers at once.
Microsoft 365 tenant-to-tenant
Merger, acquisition, divestiture or consolidation: mailboxes, OneDrive, SharePoint, Teams and identities moved from one tenant to another, with coexistence during the transition.
On-premise Exchange and SharePoint to Microsoft 365
Moving off Exchange 2016/2019 and aging SharePoint farms, in hybrid mode or direct cutover, hosted in Canada or France.
Servers and applications to Azure
Azure Migrate assessment, landing zones, wave-based migration (lift-and-shift, then modernization) and FinOps from day one to keep costs in check.
File shares to SharePoint and OneDrive
Cleanup, restructuring and permission review up front, so you land in the cloud with a clear structure and controlled access.
SCCM to Intune and Windows 11
Moving to modern endpoint management: co-management, Autopilot, Windows 11 rollout and gradual retirement of your SCCM / MECM infrastructure.
Identity: Active Directory and Entra ID
AD sync and cleanup, Entra Connect upgrade, Azure AD B2C to Entra External ID migration for your customer portals.
Microsoft end-of-support dates 2026-2027.
Microsoft end-of-support dates follow one another. We bring them together in a single migration plan.
Entra Connect Sync: mandatory upgrade
An upgrade to build into your identity migration plan.
Read the analysisOctober 31, 2026Exchange Server 2016 and 2019 out of support since October 31, 2026
Move to Exchange Online for up-to-date, secure messaging.
Read the analysisOctober 13, 2026Windows 10: ESU year 2 costs twice as much since October 13, 2026
Move to Windows 11, managed in Intune.
Read the analysisOur six-step migration method.
Every wave has its rollback plan, and the target architecture is validated before the first cutover.
- 01
Assessment and inventory
Inventory of workloads, data and dependencies, choice of migration tools, effort and risk estimate.
- 02
Target architecture
Tenant, Azure landing zones, identity, security and governance designed and validated up front.
- 03
Pilot
A first group of users or servers to validate the method, real timelines and communications.
- 04
Wave-based migration
Batches scheduled around your business calendar, with a rollback plan for every wave.
- 05
Cutover and hypercare
Reinforced support in the days after each cutover, right alongside your users.
- 06
Optimization and decommissioning
FinOps, adoption, clean retirement of the old environment and documentation handed to your teams.
Migration engagements in Quebec and France.
Our teams in Montréal and Lyon run migrations across Quebec, France and Europe: local governments, hospitals, SMBs and multi-country groups.
- Industrial distributionMicrosoft 365 tenant-to-tenant migration
- Financial servicesMicrosoft 365 tenant-to-tenant migration
- Multi-country equipment makerMulti-country Microsoft 365 tenant migration
- French local governmentMicrosoft 365 migration
- Hospitals (France)Exchange migration
- Consumer organization, QuebecAzure AD B2C to Entra External ID migration
- University hospital (France)MECM to Windows 11 migration
- Construction group, QuebecSharePoint migration and io4 360 support
Frequently asked questions
Frequently asked questions about migrations.
Another question? Write to us.
Duration depends mostly on data volume and identity complexity. An SMB with 50 to 150 users is usually migrated in a few weeks. A tenant-to-tenant migration of several thousand users is planned over a quarter, in waves. The initial assessment gives you a realistic timeline before any commitment.
Data is pre-staged in the background while users keep working, then a final sync runs at cutover, usually on an evening or a weekend. During a tenant-to-tenant migration, coexistence (shared calendars, mail forwarding) is set up so both organizations can keep collaborating.
We pick the tool for the scenario: native Microsoft tools (cross-tenant migration, Azure Migrate, SharePoint Migration Tool) when they are enough, and recognized third-party tools (ShareGate, AvePoint, BitTitan, Quest) when volume or complexity calls for them. Tool licensing is included in the estimate.
We build FinOps into the assessment: sizing based on actual usage, reservations, automatic shutdown of non-production environments and tagging to track costs per service.
Yes. Microsoft 365 and Azure offer Canadian regions (Canada Central and Canada East). We configure data residency in Canada, which supports compliance with Quebec's Law 25 and public-sector requirements.
Yes. Our Lyon office works with local governments, hospitals and businesses across France and Europe: Microsoft 365, Exchange and tenant-to-tenant migrations, and moves to Windows 11. Data can be hosted in Microsoft's French regions (France Central and France South).
We provide hypercare after each cutover. Then you can run the environment yourselves with the documentation we hand over, or entrust it to us through io4 360, our managed services contract with a bank of hours and weekly follow-up.
Discover io4 360
30 minutes to frame what matters.
A direct conversation with one of our experts: free, focused and practical. You leave with a clear, reasoned perspective on your situation.
