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Posted by Lewis-H on August 01, 2020


A Simple Approach to Office 365 Tenant to Tenant Migration

The Office 365 tenant to tenant migration is performed using PowerShell scripts or third-party tools. Before that, there is an Office 365 Pre & Post Migration checklist you should keep in mind.


Pre-migration Stage

Step 1. Domain Preparation

Prepare the domain with the following steps:


Ensure that you have enough licenses for the target Office 365.

Create admin accounts in both the source and target to perform the migration smoothly.

Create user mailboxes, room/resource mailboxes, and distribution groups in the target.

If needed, perform AD DS consolidation using AD DS tools and sync source domain with the target domain manually or using synchronization.

Train your end users regarding the post-migration use of Office 365.

Step 2. Domain verification

Start verification of target tenant domain in Office 365.

Add a source domain in the target Office 365 admin center and create TXT records in DNS.

Make sure the domain is in use only one tenant. Otherwise, the verification will fail.


After performing these steps, it will take around 72 hours for the change to be seen.


Step 3. Migration Scheduling

Generate a list of user mailboxes that are to be migrated and create a CSV file for mapping.

Note the lowest value of TTL on MX record (of the primary email domain).

Disable directory sync for source tenant (from Office 365 admin center).

Step 4. Migration Stage

Stop inbound mail flow

Stop inbound mail flow to the source tenant by changing the primary MS record to an unreachable value or by using a third-party service. As you have noted the lowest value of TTL on MX record (of primary email domain) in your preparation step, you can plan the time of this step easily.


Source tenant preparation

Before moving the Office 365 mailbox to another tenant, the primary mail domain should be erased from all objects in the source tenant.


Preparing the target domain

It involves the verification of source tenant in the target domain (do one hour after the previous step).


When you use AD FS, you’ll have to configure a new domain in target tenant for AD FS.

Activate the new user accounts in the target domain and assign licenses.

On the new users, set the source domain as the primary email address (done using Windows PowerShell). Also, decide on communicating the passwords to end users.

Now you can route the emails to the new mailboxes.

Test the mail flow in and out of the target tenant.

Now it is time to decide on the migration method. You can also decide on the type and amount of data to be migrated. Migration can be accomplished using PowerShell scripts. However, third-party migration tools are recommended as they offer complete control over the migration.


What Expert Think About Kernel Office 365 Migration Tool?

While migrating data from one tenant to another, the last thing you would want is losing data your data. Most migration experts recommend using a reliable and secure migration tool for Microsoft 365 tenant to tenant migration because it assures you to move your data without corrupting it. Even after migration, the data will be present in the same structure and format.


Kernel Office 365 Migration tool – For a quick and easy tenant to tenant migration


Kernel Office 365 Migration is an advanced tool that is specially designed for the Office 365 tenant to tenant migration. It allows users to easily migrate every Office 365 mailbox from one tenant to another. It has some amazing features that make it the best migration tool for Office 365.


Migrates from one Office 365 tenant to another without any hassles

Allow migration of multiple mailboxes from one tenant to another

Migrate unlimited user mailboxes with a CSV file

Offer specific filters to migrate selective data

Save migration report in CSV format after complete migration.

I hope this information Office 365 tenant migration is helpful. To know more about IMAP migration to Office 365 or Office 365 migration services visit O365CloudExperts.

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