How to Migrate Emails / Mailboxes Between Office 365 Tenants – Finest Way

Written By Mohit Jha
Anuraag Singh
Approved By Anuraag Singh
Published On July 8th, 2022
Reading Time 5 Minutes Reading

Tenant is a term used for an Office 365 organization where all different things are managed simultaneously. Office 365 tenant is like a container in which an organization maintains users, domains, subscriptions, & other things. When the organization decided to switch tenants their primary needs become to migrate mailboxes between Office 365 tenants or move each user’s mailbox between O365 tenants.

Office 365 Tenant to Tenant Migration is a complex task for every organization. Maybe in the future, Microsoft will simplify the complexity of Office 365 email migration between tenants. But right now there is no direct way provided by Microsoft.

But it doesn’t mean this task is impossible or you never ever can do this task. You can accomplish this migration task we are here to help you. In this blog, we will provide you with a solution to migrate emails between Office 365 tenants.

To Move Mailbox Between Office 365 Tenants – Know the Scenarios

Before performing the migration of emails between Office 365 tenants, we have to clear this scenario. When an organization decided to move their tenant, then they have many different types of data to migrate like OneDrive, Sharepoint, Mailboxes, Team, etc.

But the most important data is user’s mailboxes, custom domain users’ mailboxes, shared mailboxes, and admin mailboxes. Because emails are always important for an organization. So here we are going to explain how can you migrate mailboxes between Office 365 tenants.

Now the picture is clear, we know which type of data we will be migrating. Before proceeding to the next step where we will perform the migration, we need to understand it would be many different circumstances where the organization will need to migrate emails between Office 365 tenants.

Some scenarios are – when the organization acquires a company that also uses Office 365 tenant if a company uses multiple domains but needs to create a separate tenant for each domain, etc.

Definitely, the situation varies but the question is the same how to perform mailbox emails between two Office 365 tenants. So, to know the solution to this question we have to move on to the next steps.

How to Migrate Emails Between Office 365 Tenants?

To move entire emails between Office 365 tenants, we have to move emails from users’ mailboxes, Admin mailbox & custom domains user mailboxes. To perform this migration convenient & easy way we would like to suggest Office 365 Mailbox Migration Tool.

This software will migrate emails, contacts, calendars & documents between Office 365 tenants. Moreover, it supports domain users’ mailbox migration between tenants with this tool.

Recommendation – To know about how to migrate the domain between Office 365 tenants. Here you will get a detailed guide to performing the migration.

It supports bulk users’ mailboxes migration at a time, provides concurrent migration, allows to pause & resume migration process, date-based filter option, etc. there are many other features also provided by the software which definitely help you to in migrating mailbox between two Office 365 tenants process.

What Does the Software do to Migrate Emails Between Office 365 Tenants?

We know software migrates users’ mailboxes, and admin mailboxes but how. We will describe the whole working procedure in the next section, here we are going to explain how the software will do this migration.

The tool migrates the entire user’s data migration for that you need Office 365 source & destination admin email ID. So we have to assign impersonation privilege to Admin accounts of both source & destination.

We also need an Application ID, for that, we have to create a project in Microsoft Azure for the tool & generate an Application ID. After that, we have to grant the permissions (like Mail.ReadWrite, Calendar.ReadWrite, Contacts.ReadWrite, Directory.ReadWrite.All, etc.) as per the Application. Now, it’s time to know how the software works to migrate emails between Office 365 tenants.


How does Software work in Order to Move or Migrate Emails Between Office 365 Tenants?

Let’s start the migration of emails between Office 365 tenants. Follow all given steps to successfully migrate organization users’ emails between O365 tenants.

Before, starting the procedure you need to download the software,

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  • Start the software & select Office 365 as source & destination.
  • Now, select which data you want to migrate.
  • To migrate document with permissions tool provides Migrate Document Permissions. For group Mapping it provides Use Group Mapping option.
  • You can apply data filter to migrate selective data. After that, click on Next.
  • Now, login with source Admin email & Application ID. Then click on Validate button to migrate mailboxes between Office 365 tenants.
  • Now, permissions are validated. Click on Next.
  • After that, you have to login destination Office 365 destination with destination Admin ID and Application ID and validate permissions. Click on Next.
  • Now, to start migration between Office 365 source & destination users we have to import user mapping CSV file.
    For that, first, you have to download the user list template, then enter source & destination users ID to create the mapping between them.
  • Mapping successfully done. Click on Validate button to validate permissions to migrate Office 365 mailboxes between tenants.
  • Now, permissions are validated. Click on Start Migration.
  • Now, software start migration button to migrate mailboxes between Office 365 tenants.

It will take a few minutes to complete the process. Now you have successfully moved a mailbox between Office 365 tenants. There is no solution provides by Microsoft, but with this software, you can easily migrate emails between Office 365 tenants. The given solution will definitely help you to move Office 365 data.

Wrapping Up

It’s time to wrap it all, in this article, we have discussed the comprehensive guide to migrate mailboxes between Office 365 in the most secure & automated way. Users can easily go after the above-mentioned steps, to perform this technical operation in just in few steps, with the help of the above-mentioned software. Even novice users can also easily hands-on the above operation by following this guide.

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