How to Migrate Office 365 Tenant to Tenant?

Published On - April 19, 2025 by Nasir Khan | Reading Time: 4 minutes

In today’s technically driven businesses, company acquisition and merging are common things. It also leads to data management according to company decisions. While managing the email data and email servers, Office 365 using companies needs tenant migration or Office 365 to PST backup-like tasks. If you are also in a situation where it is a must to migrate Office 365 tenant to tenant for any reason, this blog has an effortless solution for you.

Read this write-up till the end and complete the mailbox migration from one tenant to another. Moreover, you will learn to export mailbox data to multiple file formats and email servers/clients.

What Initiates Users to Migrate Office 365 Tenant to Tenant?

• Merging/Acquisitions/ Organizational Restructuring: It is not easy to manage many Office 365 tenants, so the companies want to bring all the Office 365 tenants together.It is easy to manage and also saves money. Merging and data migration are required for business requirements.
• For New Brand or Domain: For some reason, if a company changes its brand or changes its domain name, it can migrate all its Office 365 services to a new Tenant. Mailbox migration is an essential task for managing the mailbox data.
• Cost Savings Measures: Storage management directly impacts the cost of managing the data. Sometimes, companies want to better manage resources by migrating to a new tenant.It helps with licensing, service usage, and cost savings. Discontinuing a mailbox/tenant after mailbox migration is a common thing.
• For Better Security: Migrating to the new tenant allows companies to take advantage of improved security setup, compliance tools, and administrative features that better suit their needs. Sometimes, companies face performance issues with the old tenant, or the setup does not match the user’s needs. In such a case, migrating to a new tenant can improve performance and user experience.

Workarounds to Migrate Office 365 Tenant to Tenant:

Migration from one Office 365 Tenant to another Tenant is a long and complicated process. Hence, today, we will tell you how to migrate your Microsoft 365 Tenant to another Tenant in a simple way.

1) Pre Migration Tasks

• First, evaluate your current tenant environment; along with this, understand the scope of migration, including user accounts, mailboxes, and related permissions.
• Now, create a new tenant and configure it by setting the required license. Moreover, keep Admin credentials for both source and target.
• Now, find the best migration method that fits your requirements to easily migrate your Office 365 tenant to another tenant.
• Must run the TTL (time to live) test before running the actual migration. It includes changing the MX record for the primary domain.It will help you to learn the time taken by the MX Records in getting updated.

2) Mailbox Migration

• You need to migrate users’ accounts, including their settings, licenses, and permissions. Move Data from the source to the target tenant and migrate security groups, distribution groups, and any shared resources.
• Now, ensure that applications and integrations that depend on Office 365 data are correctly configured for the new tenant.
• Change the MX record to stop the inbound email flow once all is set.

Know About a Professional Tool for Office 365 Mailbox Export Related Tasks:

• Regain Office 365 Backup and Migration Tool is advanced utility to process multiple Office 365 mailboxes of any size.
• It can migrate Office 365 mailbox data to multiple email clients/servers.
• Moreover, it permits backup in Outlook supporting PST file format, EML, MSG, and MBOX-like file formats.
• You can easily make a selection for the Primary Mailbox, Public folder, and Archive Mailbox.
• It maintains proper folder hierarchy and facilitates folder selection for processing.
• 24*7 free technical support is also available with the Regain Office 365 Backup Tool.
• Install the software for free and have a demo of this professional utility.

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3) Post Migration Tasks

• Now, crosscheck whether your user account integrations are working properly or not.
• You can eradicate or clean your old tenant data that are no longer needed in the source tenant to manage storage cost.
• Interconnect with users about the completion of migration and changes and provide them with necessary training and information.
• Check a trial by sending/receiving emails; don’t forget to check permissions decided by the admin for various roles.

Gist of the Blog:

Office 365 Tenant-to-Tenant migration is a widely done task in businesses. Reasons may differ for each organization behind the mailbox migration. Regain Office 365 Backup and Migration Tool is a one-stop solution for migrating mailbox data effortlessly. Moreover, it is easy to use and makes your migration task just a matter of a few clicks. To test and run a demo of this migration utility, just install, launch, and migrate Office 365 tenant to tenant.

Frequently Asked Questions:

Q. What will the folder hierarchy be within the mailbox after migrating tenant to tenant?

A. Don’t worry about the folder hierarchy if you migrate with this professional utility. The folder hierarchy(sequence) remains preserved, and data properties/ meta properties remain intact.

Q. Will it include all the attributes of an Office 365 mailbox, like calendars, contacts, and tasks, along with emails?

A. Yes, this utility migrates all item types of an Office 365 mailbox. Moreover, you can exclude a folder by unchecking the particular folder(es).

Q. Do I need technical assistance with this utility in executing the mailbox migration from one tenant to another?

A. This utility provides an easy-to-understand interface that allows users to execute the migration task independently. But, if you need any technical assistance, you can avail it for free. We provide 24*7 technical support for free to migrate Office 365 tenant to tenant with Regain Software. You can contact us through chat, email, or telephone.

Q. How is this Regain Tenant-to-Tenant migrator’s demo version different from the licensed version?

A. The demo version is just a restricted version of the licensed one. In working, both are the same. No restrictions with the licensed version; limitless migrate Office 365 tenant to tenant.