Office 365 to Office 365 Mailbox Migration – Comprehensive Guide

Office 365 Mailbox Migration

Are you facing difficulties while performing Office 365 to Office 365 Mailbox Migration? Are you worried about your important data, which would be going through this transition? If your answer is yes to these questions, then my friend, you are on the right page. 

In this blog, we will be going to provide you a reliable solution to perform Office 365 to Office 365 email migration. Just go through this blog, you will get a productive solution for your query.

But, before proceeding any further, let’s have a look at the user query. 


Hi there, for the merger being the reason we need to migrate 300 users about, from O365 Tenant to O365 Tenant.

My question is, how can I perform this migration quickly without losing the data integrity?


The migration projects are now arising very often because of mergers, acquisitions, department separations, and divestment. In this scenario, the user wants to perform Office 365 to Office 365 Mailbox Migration for 300 user’s accounts.

There are two ways to carry out migration projects nowadays. The first is through a manual method and the second is using an automated utility. Users can choose any of these two options depending on the number of user accounts, which are going to migrate. 

While manual method consists of many large, complex, and technical steps, involving the cmdlet scripts of PowerShell. That may require pretty good technical knowledge, as a minor mistake in cmdlet can result in an error while performing Office 365 to Office 365 Mailbox Migration through a conventional approach. 

Therefore, the manual method can be only used for a small number of user mailbox migration. But, if you have to migrate a large number of user mailboxes in O365, then it’s recommended to use a professional utility tool.

Recommended Way for Office 365 to Office 365 Email Migration:

Many industry experts recommended using an automated professional tool over a manual approach for carrying out any type of mailbox migration project in Office 365. In this situation, it is suggested to use O365 to O365 mailbox migration tool, which is capable of saving emails along with other documents throughout the migration. It is the best match for performing Office 365 to Office 365 mailbox migration tool. This is an error-free software that ensures 100% smooth mailbox migration with data protection and integrity throughout the whole process.

Advanced Features of This Utility Give It an Edge Over Others

Import CSV for Mapping: In order to create a mapping between the source and destination user’s account. This utility provides us a feature to add a CSV file. It contains a list of source user’s account and destination user’s accounts. This feature makes it pretty feasible to perform Office 365 to Office 365 mailbox migration. 

Account-Based Priority Migration: With this feature, you can add a star, provided by this software in order to set the priority of user accounts to migrate first. 

Multiple Project Migration: In this utility, users can easily configure multiple projects to perform the migration. Users can add multiple projects option displays multiple projects on the source and destination columns, making it easy to add them at once. This option helps to migrate various accounts simultaneously on a high-configuration machine.

Steps to Execute Office 365 to Office 365 Mailbox Migration

Step 1. Download and open this utility. Choose your source and destination platforms as Office 365.

destination platforms as Office 365

Step 2. From workload selection, select all the items you want to migrate and also enable migrate document permission and use the Group Mapping option.

Group Mapping

Step 3. Now, enter the source and destination admin ID and Application ID and then, click on validate button. It will validate all the required permissions.

admin ID and Application ID

Step 4. Now create Group mapping between source and destination users, in order to do this, this utility provides us three options – Fetch users, Import users, Download template. Select any one accordingly

Download template.

Step 5. Once the mapping is done. Click on validate button in order to perform Office 365 to Office 365 email migration.

Office 365 to Office 365 email migration

Step 6. Now you are ready to start the migration. Just click on the start migration button to perform Office 365 to Office 365 email migration.

email migration

Let’s Sum Up

Office 365 to Office 365 mailbox migration can be an easy task unless we use the approach for it. Hence, in this blog, we have come up with a reliable and quick solution for it. By using the above-mentioned tool, one can easily perform this type of migration in Office 365


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