Migrate Shared Mailbox to Office 365: A Step-By-Step Guide
Shivansh Shukla
December 27th, 2025
Introduction: In a remote-first environment, organizations migrate Shared Mailbox to Office 365, enabling team members to collaborate from anywhere. Doing this, employees can manage and collaborate on shared emails from anywhere and anytime. Read this technical blog to understand everything about how to migrate the Shared mailbox to an Office 365 account. This blog will explain the basic manual methods and a professional method that uses the Office 365 Backup Tool. But before looking at the solutions, let’s look at why users carry out this migration process.
User-Query:
“How can I migrate a shared mailbox to Microsoft 365 without losing emails or attachments? Do I need to convert the shared mailbox to a user mailbox and assign a license before migration?”
Reasons to Migrate from Shared Mailbox to Microsoft 365
The following are the reasons users consider carrying out this migration:
- In Office 365, teams can work together on the same inbox more efficiently and hence migrate the Shared mailbox to Office 365.
- By migrating to Office 365, the shared mailbox data is protected with advanced security measures.
- Office 365 accommodates the growing emails in Shared mailboxes without any hardware or storage limitations.
- The Shared mailboxes in Office 365 serve as a cost-efficient approach and lower the infrastructure costs.
- Migrating to Office 365 ensures uninterrupted access to shared mailboxes through built-in redundancy and failover.
How to Migrate Shared Mailbox to Office 365?
There are two ways to migrate the Shared mailbox to an Office 365 email account. One is a manual method that uses the Microsoft Exchange Admin Centre. Another is an automated tool method that automates the entire process, ensuring 100% data integrity.
Manually Move Shared Mailbox to Office 365
In this method, we’ll first convert the shared mailbox to a user mailbox. Once it is converted, the emails are then migrated using the Exchange Admin Centre.
Use the following instructions to initiate the process:
- First, head to Microsoft 365 Admin Centre and sign in with Exchange admin credentials.
- Now, go to Admin Centres > Exchange > Recipients > Shared.
- Select the shared mailbox and press Convert to regular mailbox.
- Next, click on Users > Active Users and choose the converted mailbox.
- Assign an Exchange Online license and open the Exchange Admin Centre.
- After that, choose Migration and create a New Migration Batch.
- Choose the migration type and, if needed, convert the mailbox back to a shared mailbox.
Limitations: It is not a direct migration method. Additionally, migrating a shared mailbox with over 50 GB requires a license.
An Efficient Way to Migrate Shared Mailbox to Office 365 Account
Experience a hassle-free Office 365 management with the MacSonik Office 365 Backup Tool. Users can efficiently migrate their shared mailbox to an Office 365 email account and also backup Office 365 emails. Also, throughout the migration process, it ensures 100% data integrity and accuracy. It also guarantees to intact the original folder hierarchy. Not only this, but it is equipped with smart filters that customize the whole process.
Simple steps to convert Shared mailbox to Office 365:
- Download, install, and run the tool.
- After that, click on Backup > Continue.
- Then, from the available Mail list, pick the mailbox folders.
- Now, look through the folder tree, choose the desired folders to migrate, and click Next to proceed further.
- Next, pick the Email Client as Office 365 and authenticate it with Office 365 account credentials.
- Now, add the advanced filters and specify the destination path.
- Finally, click Convert to start the migration process.
Real-life scenario:
A company using an on-premises Exchange server has a shared mailbox, such as support@company.com, accessed by multiple team members. While moving to Microsoft 365, the IT admin converts the shared mailbox to a user mailbox, assigns a license, and migrates it using the Exchange Admin Center. After the migration, the mailbox is converted back to a shared mailbox so the team can continue accessing emails and attachments without disruption.
Conclusion
The shared mailbox to Office 365 migration is crucial for improved security protocols and reduced cost. This blog has illustrated different manual and automated methods to migrate shared mailbox to Office 365. Manual migration is a bit lengthy and time-consuming. Alternatively, the automated method using the MacSonik Office 365 Backup Tool offers a reliable and error-free solution. Users can download the trial version of the tool to test out its features.
Frequently Asked Questions
Ans- To migrate a shared mailbox to Office 365, first convert it into a user mailbox and assign an Exchange Online license. Then migrate the mailbox using the Exchange Admin Center and convert it back to a shared mailbox after completion.
Ans- Yes, it is possible to move a shared mailbox to Microsoft 365 along with all attachments. When migrated correctly, emails, attachments, and the original folder structure are preserved.
Ans- The time to convert a shared mailbox to Office 365 depends on the mailbox size, network speed, and migration method used. Small mailboxes may take minutes, while larger ones can take several hours or longer.
Q4- Which is the best tool to migrate Shared mailbox to Office 365?
Ans- The best tool to migrate the Shared mailbox to Office 365 is the MacSonik Office 365 Backup Tool. This tool efficiently migrates the Shared mailbox to an Office 365 email account.
About The Author:
Shivansh Shukla is a technical content writer who researches and provides reliable solutions to help users resolve their problems. He offers effective procedures for email migration, data backup, and file conversion for all technical and non-technical users.
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