What is a tenant to Tenant Migration?
What is a tenant-to-tenant migration?
A Microsoft 365 tenant is an individual and unique customer account that provides an environment for controlling Microsoft 365 users, services, and data. Tenants are hosted on Microsoft’s cloud servers, which are redundantly backed up and spread out all over the world. Microsoft 365 tenants are used in a variety of ways depending upon the needs of different customers, and licensing determines which features get unlocked.
Office 365 Tenant Migration involve the migration of mailboxes and service settings from one Microsoft 365 tenant to another one.
When do I need a tenant-to-tenant migration?
The number of cloud adoptions among businesses is increasing each day. There are several architecture approaches for mergers, acquisitions, divestitures, and other scenarios that might lead you to migrate to a new cloud tenant:
Microsoft 365 tenant name change.
Once you create a tenant with the name, there is no option to change it. So, it's really important to choose the right name before creating a tenant. In this case if you want to use a different tenant name, you will need to create a new tenant and move/migrate data and users to it.
Microsoft 365 tenant location (region) change.
When you create a new Microsoft 365 tenant account, it automatically checks up the external IP that generated the request and provisions the tenant in that particular region. You cannot change the Microsoft 365 tenant region as Microsoft has already created the specific instances for all workloads and secured the required namespaces which cannot be modified. The only way to change the tenant location is to create a new tenant on your desired location and migrate the data from the old to a new one.
A merger or an acquisition.
Dealing with a company merger or acquisition can be challenging as this involves migrating data to Microsoft 365 or merging tenants. There are several scenarios you can consider at the time of mergers and acquisitions:
Tenant-to-tenant migration without rebranding.
You may use this scenario if you are selling your business unit and brand identity. Identities will migrate to a target tenant and will keep the existing domain as part of the migration.
Tenant-to-tenant migration with rebranding.
This business scenario is used when the business unit adopts the target company’s branding. In this case identities will migrate to a new target tenant and will change the brand identity as part of the migration.
Cloud tenant move.
When you need to split users across two tenants, you should consider cloud tenant move. If you follow this scenario, identities will remain in the source tenant, but all users in the affected domain and all workloads are moved to a new cloud tenant.
To know more about Migrate Dropbox to Office 365 or SharePoint Migration from 2013 to 2019 visit O365CloudExperts.

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michael hooper commented
Just wrapped up a major migration project and wanted to recommend MailsDaddy Cross-Tenant Migration Service to anyone needing to transfer users between Microsoft 365 tenants.
We had to move over 500 accounts from one tenant to another, including personal mailboxes, shared folders, calendar data, and OneDrive content. This wasn’t something we could afford to mess up, so we looked for a solution that was secure, tested, and easy to manage.
MailsDaddy provided a complete cloud-based migration experience that required no installations or PowerShell scripting. User mapping was handled through simple CSV upload. We tested batches first and then completed the full migration with the delta sync option to update only the latest data.
The dashboard showed detailed logs and live status, and the final reports were audit-ready. I was also impressed with the folder and date filter options, which made it easier to streamline data transfer.
Their support team went above and beyond—from initial setup to final validation. I’d strongly recommend this tool for MSPs, IT admins, or anyone involved in Microsoft 365 migrations.
Get full details here:
👉 https://www.mailsdaddy.com/services/cross-tenant-migration.php -
Pradeep Sharma commented
Office 365 tenant to tenant migration is processed to move data from one Office 365 tenant to another. It is not limited to mailbox and OneDrive only. Native method supports only mailbox and OneDrive data and requires cross tenant user data migration license. For complex workloads like Teams and SharePoint, you will be required to use third-party migration solutions providers like CloudBik.
Learn more: https://www.cloudbik.com/solutions/microsoft-365-tenant-migrations
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Jacksonallen commented
Tenant-to-tenant migration refers to the process of transferring data, applications, and configurations from one tenant to another in Microsoft 365. This type of migration is typically needed during mergers, acquisitions, divestitures, or organizational restructuring. It involves moving mailboxes, files, user accounts, permissions, and other resources while ensuring data integrity, minimizing downtime, and maintaining compliance. Effective planning, tool selection, and testing are critical to ensure a seamless migration experience. Users can manually perform Office 365 Tenant to Tenant and using third party tool.
Read More: https://www.adviksoft.com/blog/office-365-tenant-to-tenant-migration/
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James Stuart commented
A tenant-to-tenant migration is the process of moving a mailbox from one tenant to another tenant in Microsoft Office 365. One can migrate mailboxes between Office 365 tenants, manually or through third-party tools or services. To check out the complete manual process.
https://www.cloudbik.com/resources/blog/tenant-to-tenant-migration-office-365/