Home » Blog » Office 365 » How to Perform Office 365 Tenant to Tenant Migration Step by Step?

How to Perform Office 365 Tenant to Tenant Migration Step by Step?

Published By Jamie Kaler 
Rollins Duke
Approved By Rollins Duke
Published On March 21st, 2024
Reading Time 11 Min Read

How to do Office 365 tenant to tenant migration step by step is a question of a million bucks. In this, the organization migrates workload from xyz.onmicrosoft.com to the abc.onmicrosoft.com domain.

Most of the time, what IT users do is take the backup of one Office 365 tenant and restore it to another. However, this is not the expert way for Microsoft 365 tenant to tenant migration step by step.

Enterprises running on the Microsoft 365 license service can access all the traditional Office apps in one place. They can manage and share the workload with several applications like One Drive, OneNote, Power Automate, Calendar, People, Skype, PowerPoint, and many more.

It can be the primary reason why the adoption of Office 365 is increasing in the enterprise world. However, managing several Office 365 accounts is not an easy task. Due to merger, re-branding, and acquisition needs, organizations plan for Microsoft 365 tenant to tenant migration step by step.

This migration can be for the same domain or a different domain, depending on the organization’s needs. The scenario in which the source and target both are Microsoft 365 is called Office 365 tenant to tenant migration for the same domain.

Before moving ahead with the documentation revealing the preparation, step-by-step process, common challenges, and robust solution for Office 365 tenant to tenant migration, know that Microsoft doesn’t have an in-house mechanism for the tenant to tenant migration in O365.

Reasons for Microsoft 365 Tenant to Tenant Migration

The below-highlighted scenarios are the results of a survey conducted by the RecoveryTools team. It reveals some of the common challenges enterprises face during the Office 365 tenant to tenant migration step by step.

I’m going to migrate a customer to their O365 tenant. I started with a Mailbox, but after the migration (completed), I’ve seen that many emails have not been migrated to the tenant (thousand emails!). Then, I migrated the same mailbox into a PST without losing emails. What’s the cause? – Kevin Williamson
I have reviewed some of the O365-to-O365 mailbox migration tools. However, the source tenant is not providing Admin access, is there any way around this? – Peter
I am the administrator of a small nonprofit trying to migrate two users from the Office365 online environment to another (tenant-to-tenant) migration. I would like to know the best solution for the small data transfer I am trying to manage. – Mary

In the above scenario mentioned, every user has a unique concern for Office 365 tenant to tenant migration same domain. First, whether you are an IT Expert or a standard user, you need to know how to prepare the environment for the mechanism. The below section details everything about it.

Office 365 Tenant to Tenant Migration Step by Step

  • Step 1: Run the given Migration Tool.
  • Step 2: Put the first Office 365 details.
  • Step 3: Choose the required folders.
  • Step 4: Choose a destination as O365
  • Step 5: Enter login details and filters.
  • Step 6: Next start the Office 365 tenant to tenant migration.

To know more about this amazing method, follow the expert solution, which is given below after the manual methods.

Pre-Planning for Office 365 Tenant to Tenant Migration

Here we are going to explain some preparation, which is required before using any expert tool. All the steps are mentioned below in detail.

Step 1: Prepare Domain

  1. The license of a Targeted Office 365 Account is required.
  2. Make admin accounts in both source and destination accounts for better migration.
  3. Now create user mailboxes, room/resource mailboxes, and distribution groups in the destination account.
  4. Combine AD DS stuff using AD DS tools. Connect the old domain to the new domain by hand or with synchronization if necessary.
  5. It’s really important to teach end users how to use Microsoft 365 after we move to it.

Step 2: Domain Preparations

  1. Now start the verification of the target tenant domain in Office 365.
  2. Add the source domain in the destination O365 admin center and make TXT records in DNS.

Important Note: Ensure that the domain is being used by only one group. Otherwise, the confirmation won’t work. Once this is done, it might take about three days for the change to show up.

Step 3: Schedule the Process

  1. Create a CSV file and add the user mailboxes that are to be migrated.
  2. Enter the lowest value of TTL on the MX record.
  3. Turn off directory sync for the original group (from the Microsoft 365 control center) so that any changes in the original group’s AD DS don’t get matched with Microsoft 365. It’ll take at least one day to finish turning this off.

Step 4: Migration 365 Tenant to Tenant Migration Step by Step

This step has 4 phases one by one, and you have to follow all the steps carefully.

Phase 1: Pause Incoming Emails

To start, temporarily block the flow of new emails to your original organization. This can be done by altering the main record governing email delivery or utilizing an external tool. Keep in mind the shortest time required for email record updates, which you identified earlier. This information will help you choose the optimal time for this action.

Phase 2: Prepare the Source Organization

Before transferring your Microsoft Office 365 emails to a new organization, ensure that the primary email address is dissociated from all entities within the original organization.

  1. Revert the default email address to the original one you used when you initially set up Microsoft Office 365.
  2. Remove all specialized licenses for Lync from the original organization. This can be accomplished through the Lync Admin Portal.
  3. Set the original domain as the default email address for distribution lists, rooms, and resources.
  4. Eliminate any extra email addresses associated with objects in your organization.
  5. Using Windows PowerShell, execute the command “Get-MsolUser -DomainName xyz.com”. This will display a list of entities that still employ the primary email address or are reluctant to be disassociated. Address these instances accordingly.

Phase 3: Preparation of Target Domain

This process involves confirming that the initial group is linked to the new location.

  1. Begin by setting up the auto-discover CNAME.
  2. If you’re using AD FS, establish a new group in the new location for it.
  3. Ensure the new user accounts are active in the new location and provide them with the necessary permissions.
  4. Set the original group’s email as the primary one for the new users. Also, share their passwords with them.
  5. Once user mailboxes are ready, modify how emails are routed and switch to the new Office 365 email address.
  6. Lastly, test the ability to send and receive emails in and out of the new location.

Let’s Start the Migration Process

  • When you have 500 users or fewer, move emails, calendars, and contacts one by one to the new mailbox. You can choose a specific time frame for moving emails.
  • If you have more than 500 users, use a step-by-step method to move data. Users can move contacts, calendars, and only one week’s worth of emails at a time.

This is the time to choose the right migration method. Users can also decide the types and amounts of the data. You can use special computer commands (PowerShell scripts) to do the moving.

However, it’s a good idea to use special migration tools. These tools give you full control over the move and do it quickly and easily for you.

Office 365 Tenant to Tenant Migration Step by Step Automatically

The RecoveryTools Office 365 Migration Tool is one of the best applications that provide a direct way to migrate emails from two or more Office 365 accounts easily. It is a highly recommended solution to migrate selected emails to another account directly. You can also download the solution on your Windows and Mac Computers.

The tool has a end number of advanced features and filters, which makes the software highly advanced and more usable for all technical and non-technical users. You can download the software using the mentioned buttons:

Note: You can test the trial edition of this application free of cost. Do Office 365 tenant to tenant migration of some emails only to know the working process of this application. For more information, you need to purchase the software key.

Features of Microsoft 365 Tenant to Tenant Migration Tool

  • 100% Secure Migration Solution Interface: The recommended solution is completely free of any type of risk. It comes up with a 100% secure interface that never stores user data in the software database. The interface also never saves user credentials in the software caches. It is a completely secure user interface for all types of users.
  • Complete Mailbox Migration: This application is helpful for users who want to migrate mailbox data from one O365 account to another. The utility migrates all items of a mailbox with attachments to another Office 365 account.
  • Migrate Selected Emails with Filters: Also, it comes with multiple advanced filters that allow you to migrate emails selectively. One can easily use these filter options to migrate emails by subject, email address, by date and time range, etc. Also, if you want another filter to manage your mailbox data, you can request more features from us.
  • Preserve Folder Hierarchy: This Office 365 tenant to tenant migration tool will preserve the on-disk system folder hierarchy of the Office 365 mailbox during the process. Emails from a folder in Microsoft 365 will move to the same folder in another account without any changes.
  • Maintain Original Email Properties: Moreover, the utility will keep the accuracy of your data during the migration process. The software preserves all your original email components such as attachments, email addresses, email subjects, internet header properties, inline images, hyperlinks, etc.

How to Do Office 365 Tenant to Tenant Migration Step by Step?

  1. Launch and Install the given migration tool in your existing system and start the process.

    tool to microsoft 365 tenant to tenant migration

  2. Now, enter your source Office 365 account credentials in the user interface.

     source Office 365 account

  3. Select the required Office 365 email folders which you want to migrate into another Office 365 account.

    required Office 365 email

  4. Now, choose the Office 365 option in the list of file-saving options.

    Office 365 option

  5. Enter your destination Office 365 account credentials in the user interface panel.

    Office 365 account credentials

  6. Also, you can choose the additional filter options to office 365 tenant to tenant migration step by step selectively.

    choose the additional filter

  7. Finally, click on the Next button to start the Migration process.

    Office 365 tenant to tenant migration step by step

Frequently Asked Questions

  • Ques 1: What are the benefits of tenant to tenant migration in Office 365?

    Ans: Moving everything from different Microsoft 365 groups into one group makes things simpler and more organized.

  • Ques 2: What does tenant to tenant migration mean?

    Ans: Office 365 tenant to tenant migration means moving your workloads from one to another Microsoft tenancy.

  • Ques 3: What is an Office 365 tenant?

    Ans: Your Microsoft 365 tenant is like a bundle of tools and services for your organization.

  • Ques 4: What is cross-tenant migration?

    Ans: Cross-tenant mailbox migration allows tenant admins to utilize known interfaces including Exchange Online PowerShell and MRS to transfer users to their new organization.

  • Ques 5: What is the difference between porting and migration?

    Ans: Porting is a comprehensive concept encompassing the process of modifying code to suit a particular system. Migration can be considered a variant of porting.

  • Ques 6: Is this software allowing users to migrate complete data of Microsoft 365?

    Ans: Yes, users can migrate the complete data of O365 including emails, contacts, calendars, notes, journals, tasks, etc.


After reading this article, you will learn the process of Office 365 tenant to tenant migration step by step. Here, we use one of the best utilities developed by RecoveryTools team experts that helped us a lot in bringing out the migration instantly. It is so much more difficult task for users to do these types of migration as they need to take care of their entire organization’s data stored in their tenant accounts. Apart from that, we talk about this utility, then it can provide you with convenient results and will make your entire data safe and secure without having any limitations.