Microsoft 365 Tenant-to-Tenant Migration
Merging, acquiring, or separating? Maintech moves mailboxes, OneDrive, SharePoint, Teams, and identities between Microsoft 365 tenants as one coordinated program, with a planned cutover and support for your people afterward.
Delivered by the team behind Maintech’s tenant and business separation programs.
Why Tenant Migrations Feel Risky
Email, files, and Teams are where work happens, so a tenant move touches everyone at once. Identities, devices, and app sign-ins are tied to the old tenant, and the business expects it all to keep working on Monday.
“If email goes down during the move, the whole company will notice in minutes.”
“We don’t know what happens to shared mailboxes, Teams chats and OneDrive permissions.”
“The acquisition closed, and now we have two tenants, two domains and one deadline.”
One Coordinated Move, Not a Weekend Gamble
Maintech migrates identity, collaboration, devices, and business applications together.
Data is pre-staged; pilot groups go first, and every wave follows a checklist, so cutover is short and planned.
Tenant Migration Inside a Business Separation
A new tenant built and moved users, mailboxes, files, and devices across multiple locations as part of a full company separation.
Tenant Migrations for Growing Firms
Mailboxes, OneDrive, SharePoint, Teams, Entra ID, and Intune enrollment moved in documented projects, each with pilot groups and scheduled hypercare.
Hybrid Workload and Identity Migration
Mailboxes migrated with MigrationWiz alongside servers, DNS, and SaaS single sign-on in one phased program.
What Moves in a Tenant-to-Tenant Migration
Everything your people use day to day moves to the new tenant, and the scope is agreed item by item up front.
Area
Exchange Online
What moves
User and shared mailboxes, aliases, delegates, calendars, and mail flow rules
OneDrive and SharePoint
Files, sites, and libraries, with permissions mapped to new accounts
Microsoft Teams
Teams, channels, and channel files; chat history as agreed in scope
Identity
User accounts, groups, MFA, Conditional Access and admin roles in Entra ID
Devices
Intune enrollment, app deployment and compliance policies
Applications
SaaS single sign-on and line-of-business app access
Domains
Email domains and DNS, moved at cutover
How Maintech Protects Productivity During a Tenant Move
Scope Every Workload
Mailboxes, sites, Teams, identities, devices, and apps counted and agreed before work starts.
Prepare the Target Tenant
Identity, security policies, and licensing ready in the new tenant before anyone moves.
Pre-Stage the Data
Mail and files copy ahead of time, so the final cutover only moves recent changes.
Pilot Groups First
A representative group moves first to prove the process and the user experience.
Planned Cutover Windows
Domain and DNS changes run in an agreed window, with a checklist and issue register.
Hypercare and Handoff
Scheduled support after cutover, user guides, and a formal handoff to operations.
How a Tenant Migration Works
Step 1
Scope: Inventory mailboxes, sites, Teams, identities, devices, and apps, then agree what moves.
Step 2
Prepare: Configure the target tenant, licensing, identity, and migration tooling.
Step 3
Migrate: Pre-stage data, run pilot groups, then cut over in planned waves.
Step 4
Support: Hypercare, issue resolution, user guides, and formal handoff.
What the Engagement Delivers
Migration
Scope
and Plan
What moves, in which wave, with tooling and cutover dates.
Ready
Target
Tenant
Identity, security policies, licensing, and device management configured.
Migration Checklists and Issue Register
Per-wave checklists, user validation, and a tracked issue log.
User Communications and Hypercare
Pre-move emails, quick-start guides, and scheduled post-cutover support.
Why Maintech for Tenant Migration?
- 50+ years in IT services, with service desk support ready for cutover day.
- Identity and devices included, not just mailboxes and files.
- Onsite help where needed, with directly employed technicians for device and desk-side support.
- Governed delivery, with checklists, an issue register, and sign-off for every wave.
Frequently Asked Questions
What moves in a tenant-to-tenant migration?
A tenant-to-tenant migration moves Exchange Online mailboxes (with aliases, delegates, and mail flow), OneDrive, SharePoint sites, and Teams content, plus user identities, groups, Intune device enrollment, and single sign-on to SaaS apps. Your email domains move to the new tenant at cutover.
How long does a tenant-to-tenant migration take?
A few dozen users can move in weeks; larger or multi-site organizations migrate in waves over a few months. Pre-staging data ahead of time keeps the final cutover short.
How do you avoid email downtime during a tenant migration?
Mailbox data is pre-staged in the new tenant, DNS changes are prepared in advance, and the domain cutover runs in a planned maintenance window followed by a final delta sync. Users see a short, scheduled change rather than an outage.
What happens to Teams and OneDrive?
OneDrive files and SharePoint content are copied with permissions mapped to the new accounts, and Teams teams, channels, and files move with them. How much chat history moves depends on the tooling, so it is agreed in scope up front.
What tools do you use for tenant-to-tenant migration?
Maintech uses MigrationWiz for mailbox and document migration, alongside Microsoft’s native tools where they fit the scope, with a migration checklist and issue register for every wave.
What do users need to do?
Very little. Users sign in with their new account, re-register MFA, and reconnect Outlook and OneDrive, following short guides. Maintech provides the communications and hypercare support after cutover.
Plan a Tenant Move Your People Barely Notice
Start with a Tenant Migration Scoping Call. We confirm the tenants, users, and workloads in scope and your target date.
- A clear list of what moves, and when
- A cutover plan built around your business calendar
- Works alongside your internal IT team or existing provider