Microsoft 365 is a critical component of how businesses get things done. And yet, sometimes you need to switch all that important data around from one Microsoft 365 account to another. That's usually when there's a company merger, a business gets taken over, there's a restructuring going on, the company's outgrown its current domain name. For managed service providers (MSPs) and smaller businesses, getting this process right is important. A tenant-to-tenant migration helps organisations move all that Microsoft 365 data around without messing up the way people's mailboxes and calendars look, or losing any important attachments and contacts. This guide is going to break down the key approaches that MSPs and SMBs should know about before taking the plunge on a Microsoft 365 tenant migration.
What Is Microsoft 365 Tenant Migration?
Microsoft 365 tenant-to-tenant migration is the process of moving an entire business's worth of organisational data and all the services that come with it from one Microsoft 365 account to another. Each Microsoft 365 tenant acts as its own separate environment. It's got its own users, its own domains, its own security settings, mailboxes, and tons of other config stuff that's all locked down. Unlike a simple mailbox migration which is basically just copying email addresses around a tenant-to-tenant move can be complex. We're talking about multiple users, different types of Microsoft 365 data.
Depending on the specific job at hand, organisations may need to:
|
User
mailboxes |
Shared
mailboxes |
Emails and
attachments |
Contacts |
Calendars |
|
OneDrive
files |
SharePoint
data |
Mailbox
permissions |
Folder
structures |
Other
supported Microsoft 365 data |
Why Do Businesses Need Tenant-to-Tenant
Migration?
The following are the several situations why users choose this:
|
Business Mergers and Acquisitions Merging Microsoft 365 environments by
bringing users and data together in one tenant. |
Company Rebranding & Restructuring Move selected users and data to a
separate tenant when restructuring business units or subsidiaries. |
|
Domain Changes Move people & data to a fresh new
Microsoft 365 tenant when you've changed your corporate domain time for a
rebrand. |
MSP Client Transitions Help companies like yours shift their
Microsoft 365 setup if they're switching providers, combining multiple
tenants or changing the way they're structured. |
How to Get Ready for a Microsoft 365
Tenant-to-Tenant Migration?
Step 1: Get a Handle on the Source
Tenant
- First things first, figure out who's
moving, where all their mailboxes and OneDrive accounts are, and what other
data is included in the move.
- Take note of who's got the biggest mailboxes and who's storing the most stuff - this will help you plan the migration.
Step 2: Get the Destination Tenant
Shipshape
Before you
start moving everything over, set up the new environment and make sure all the
users are created and properly licensed.
Step 3: Map Users Across Tenants
Make a list
that says "User X goes to User Y" etc - this helps you keep track of
who's moving where.
Step 4: Review Your Domains & DNS
Setup
Plan your
domain transition with care it's a good idea to update DNS records like MX
records, Autodiscover settings, SPF records, DKIM and DMARC depending on how
your migration is set up.
Step 5: Run a Pilot Migration
Before
migrating the entire organization, select a small group of users for testing.
Verify:
- Emails and attachments
- Folder hierarchy
- Contacts
- Calendars
- Mailbox access
- Migration logs
- User authentication
A pilot
migration helps identify problems before they affect the entire organization.
Step 6: Migrate Users in Batches
When it comes
to bigger organisations migrating staff, breaking the task into smaller batches
can make life a lot easier. Plus, it gives the admin folk a chance to spot and
sort out any issues before they start affecting a huge number of employees at
once.
Step 7: Tie up Loose Ends
After the
initial migration's finished, give the final sync a run to capture any data
that's been created or changed since everything got moved over. Then you can
flip the switch and have everyone in the destination tenant.
Step 8: Double Check Everything
Before you go
ahead and shut down the old system, make sure you've given the new one a good
go over, checking that email content, attachments, folders, permissions and all
the other stuff made it over just right.
Tenant-to-Tenant Migration Solutions for
MSPs and SMBs
If you want to
make life a lot easier, a professional migration solution can sort everything
out for you. These solutions let you manage an entire migration from one place,
and they can even do bulk mailboxes, filter the data and give you nice reports.
A dedicated Microsoft 365 tenant-to-tenant
migration tool helps administrators transfer mailbox data between tenants while preserving
folder structure and key email properties. Moreover, this software enables
users to export Microsoft 365 shared mailbox to PST efficiently with
zero data loss.
Why Use Office 365 Migration Services?
Professional assistance can help with:
|
Migration planning |
Data
assessment |
Pilot
migrations |
Troubleshooting |
|
User and
mailbox mapping |
Bulk mailbox
migration |
Domain
transition planning |
Post-migration
verification |
Conclusion
In this post,
a successful tenant-to-tenant migration requires careful planning of user
mapping, domains, mailbox sizes, permissions, compatibility, and post-migration
verification. However, the manual migration may suit small environments, while
larger projects can benefit from professional tenant-to-tenant migration
solutions. By assessing the source, preparing the destination, testing with a
pilot, migrating in phases, and verifying results, organizations can minimize
disruption and ensure a smoother Microsoft 365 migration.