How to Migrate Bulk Mailbox to Office 365 Hassle-Free?

Suppose you are an Admin of an organization and decide to migrate bulk mailbox to Office 365 because of many reasons behind it like hardware cost maintenance. Within this guide, you learn all the techniques for the same. So, the decision to opt for cloud-based services is an intelligent one. 

Why not? Office 365 is known for its productivity tools and 24*7 support of its users. The procedure to migrate large mailbox to Office 365 is complicated and time-consuming. Plus, it needs a perfect pre and post-migration checklist plan to proceed with the flawless transition. 

Let’s start our discussion with the advantages of Microsoft 365.

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Why Opt for Office 365 Instead of On-Premise Exchange?

There are several reasons why most users want to migrate bulk mailbox to Office 365. Below outlines are the key points of it:

1. With Office 365 you have a secured cloud-storage with which you can easily restore your data if it is lost.

2. The Online Exchange(Microsoft 365) provides various collaboration tools including MS Teams. Also, organizations are relying on these services to transfer their content to another colleague or another team member. 

3. This provides the functionality to access your entire data from anywhere via an internet connection which enhances the remote work experience.

4. This offers the automatic updates feature to minimize your workload. On the other hand, with Exchange Server, the Admin has to update this manually which is a time-consuming procedure.

After learning the main pros of Office 365, we will move to the next section in which we discuss the manual technique for the transition.

Can I Migrate Bulk Mailbox to Office 365 Manually?

Yes, you can initiate the migration procedure manually, but first, you have to set up the hybrid deployment. Plus, the transition time depends on the number of mailboxes that you want to move. Also, you have to give the mandatory permission to execute the procedure.

At the beginning, set up remote migration points on the Exchange server. These points store connection settings for a crucial service, Mailbox Replication Proxy. Turn on this service.

• Go to Exchange Admin Center, then Servers–Virtual Directories.

• Find the EWS virtual directory, and click Edit.

• Enable Mailbox Replication Proxy.

• Save changes to finish.

Step 2. Migrate Large Mailbox to Office 365 Using EAC

Making the migrate bulk mailbox to Office 365: you first, navigate to Office 365’s Exchange Admin Center, and find the wizard for moving mailboxes known as Remote Move Migration. Then, follow the below-mentioned guidelines to proceed:

• In the Exchange Admin Center, head to ‘Office 365 — Recipients — Migration’.

• Choose ‘Migrate to Exchange Online’ and select Remote migration move.

• Pick the on-premises users for the move to Office 365. Click next after adding.

• Enter your Windows user account details in the ‘On-premises administrator name’ column. Click next.

• Check the details on the confirmation page and proceed by clicking Next.

• Under ‘Move configuration’, name the new migration batch.

• Choose the target delivery domain for the mailboxes heading to Office 365 and proceed.

• On the ‘Start the batch’ page:

  • Select at least one recipient for the batch.

  • Collect the complete batch report.

  • Check ‘Automatically start the batch’ and ‘Automatically complete the migration batch’.

• After bulk mailbox migration, remove the finished migration batches to avoid errors.

So, this traditional technique seems quite as complicated and error-prone. Therefore, in the next part of the phase, we will discuss an alternative technique to proceed with the transition in a better way.

Transferring Entire Mailboxes to Microsoft 365 With an Automated Solution

Right now there is only one utility that is highly recommended and even opted for by IT company Admins. Plus, the solution is known as SysTools Exchange to Office 365 Migration Tool. Moreover, it offers a user-friendly interface so that even a naive user can operate this utility. 

Also, with this, you can easily migrate bulk mailbox to Office 365 including Email, Contacts, and Calendar with as it is hierarchy. By using, this you won’t face any compatibility issues as it can move your information from Exchange On-Premise 2010, 2013, 2016, and 2019 to another platform. 

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The below outlines the instructions of the same:

Step 1. Download and open the migration tool.

Step 2. Choose “Exchange” as the source and “Office 365” as the destination.

Step 3. Select desired categories for migration (e.g., emails, contacts).

Step 4. Utilize Date Filter and Group Mapping options.

Step 5. Input essential Exchange Server details:

• Exchange Server Version

• Admin Email

• Admin Password

• Active Directory IP

• Exchange Server IP

• Include Sub Domain

Step 6. Click ‘Validate’, then proceed by clicking ‘Next’.

Step 7. Provide Admin Email and Application ID in the Destination window.

Step 8. You can add users from the old account using different methods: Fetch Users, Import Users, or Download Template.

Step 9. Initiate the migration by clicking ‘Start Migration’.

Additional resource:

Bottom Line

Moving all your email accounts to Office 365 can make things easier for everyone on your team. It’s like upgrading to a better and more organized system. If you migrate bulk mailbox to Office 365, saves your money and helps to minimize the workload with its productivity tools. Therefore, within this write-up, we learned the most relevant solution to migrate large mailbox to Office 365 reliably.