Sometimes Office 365 administrators need to migrate mailboxes from one tenant to another, but they don’t find any suitable ways for it. Though there are some manual approaches, they are very complex, and you won’t be able to perform it without proper guidance and technical knowledge. Many queries related to this can be found in Microsoft’s forums too.
So, here we are going to discuss some basics that can help you migrate mailboxes from one Office 365 tenant to another. Also, here we’ll talk about how you can plan the migration.
The Office 365 tenant to tenant migration is performed using PowerShell scripts or third-party tools. Before that, there are a few things that you should keep in mind.
Prepare the domain with the following steps:
Make sure the domain is in use only one tenant. Otherwise, the verification will fail.
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.
Before moving the Office 365 mailbox to another tenant, the primary mail domain should be erased from all objects in the source tenant.
It involves the verification of source tenant in the target domain (do one hour after the previous step).
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. They allow to schedule the migration and also to filter the data to be migrated.
Kernel Exchange Migrator is an advanced tool that is specially designed for Exchange to Exchange migration (same domain, cross-domain, & cross-forest), Exchange to Office 365 migration, Office 365 to Office 365 migration, etc. It allows users to easily migrate every item of their Office 365 mailboxes from one tenant to another. It has some amazing features that make it the best Exchange migration tool for Office 365:
Let’s have a look at the working process of this tool:
Note: You can apply multiple filters to the mailboxes, such as message classes, date range, and other folder filters.
Note: Kernel Migrator for Exchange allows you synchronize migrated mailboxes; also, you can skip mailboxes if the bad count exceeds the specified limit.
Note: You can specify the hours for migration according to your requirements with Kernel Migrator for Exchange. Also, it allows you to schedule the migration based on your preferences. After scheduling the migration job, click “Next.”
The migration report can be saved in HTML or PDF format. This way you can quickly perform Office 365 tenant to tenant migration using Kernel Migrator for Exchange tool.
The manual approach to moving mailboxes from one Office 365 tenant to another is very complicated, as it is based on PowerShell scripts. Not every user is capable of using the Shell Scripts because it requires technical expertise. So, Kernel Migrator for Exchange is the best option that allows you to move Office 365 mailboxes from one tenant to another. Even non-technical users can easily migrate their Office 365 data using this tool. Also, you can use this software to migrate your public folders from one Exchange version to another .