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Written By Harshita Sachdeva
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Approved By
Shivam Rathore -
Updated on September 9th, 2026
Migrate Google Takeout Emails to Office 365 for Enterprise Users: Gmail Takeout Data, Emails & MBOX Files
Fact-checked and reviewed in accordance with our
Editorial Policy
David Ambrehen, IT Administrator, Edinburgh, Scotland:
Recently, our organization decided to switch to Microsoft 365 from Google Workspace. Since the Gmail inbox contains 4+ years of emails, including different labels, sub-levels, and shared folders, we need to import Google Takeout emails without any loss of structure and information. We have already tried the manual methods, but they didn’t work well. Please let me know if there is any effective approach to migrate Google Takeout emails to Office 365.
Summary: Organizations shifting from Gmail or Google Workspace to Microsoft 365 mainly face one problem. The problem is that there is no built-in method between Google Takeout and the Exchange Online mail structure. Anyone who wants to import Google Takeout emails to Office 365 has to follow a manual method or depend on software. That’s why the Aryson MBOX File Converter exists. That makes this complex process simpler and easier.
What It Means to Migrate Google Takeout Emails to Office 365
It’s the process of taking the mail, folders, and attachments inside a Google Takeout export and turning it into a format that Outlook can read. Theoretically, it seems simple to transfer Google Takeout data to Office 365. But it is not, as a direct method doesn’t exist for this between these two ecosystems. The difference between these platforms can be seen as follows:
- Google Takeout: keeps your mailboxes as an MBOX file. It’s a plain archive, and every label inside it is under the same container.
- Office 365: stores mail in a mailbox database called a PST. Outlook and Exchange can read these files by forming an IMAP connection.
Manual Method to Transfer Google Takeout Emails to Office 365
Office 365 doesn’t have a tool built for this kind of operation. So admins usually follow different native options. That mainly depends on the size of the mailbox. Half of the method is completed by users only. The other half is where you import the PST into Office 365.
Step 1: Export the MBOX file from Google Takeout
- Go to Google Takeout and sign in to your account.
- Deselect all except Mail, then click Next.
- Choose a one-time export, .zip file type, and preferred archive size.
- Click Create Export.
- When Google emails the download link, download and extract it. After extracting, you can access all MBOX files
Step 2: Convert MBOX to PST Before Importing into Outlook
Before importing MBOX files into Outlook, follow these steps:
- Import MBOX into Thunderbird—
- Open Thunderbird,
- Then add the ImportExportTools NG add-on (Tools > Add-ons).
- Create a local folder, right-click it,
- Choose “ImportExportTools NG.”
- then “Import mbox file(s),”
- Select your MBOX file(s) to load them into Thunderbird.
- Drag and export to PST—
- With both Thunderbird and Outlook open,
- Drag the imported folders/emails from Thunderbird into the Outlook mailbox
- Then in Outlook, go to File > Open & Export > Import/Export > Export to a file > Outlook Data File (.pst) to save it as a PST.
Step 3: Migrate Google Takeout Emails to Office 365
A straightforward Google Takeout to Outlook migration usually starts here. Bring the converted file into Outlook.
- Open classic Outlook and make sure your Microsoft 365 account is configured.
- Select File, click Open & Export, and then Import/Export.
- Choose Import from another program, then select Outlook Data File (.pst).
- Choose the destination folder.
- Select the folders to import and choose the appropriate Microsoft 365 mailbox as the destination.
- Click Finish and allow Outlook to complete the import. Verify after the process is completed.
Drawbacks of Manual Methods
A few other limitations are worth knowing before you migrate Google Takeout emails to Office 365.
- Loss of folder hierarchy—nested Gmail labels lose their structure once squeezed into MBOX and converted back out; sub-labels often collapse or duplicate into “All Mail.”
- Inconsistent PST import behavior—how the import performs depends on which build of Outlook you’re running, so results aren’t predictable across environments
- No multi-mailbox support—none of the native methods can handle more than one mailbox at a time, making it impractical for organization-wide migrations
- Attachment loss—attachments (especially large ones) are frequently dropped during conversion
- Manual/labor-intensive—the process is split into two separate stages (export, then convert/import) that the user has to manage themselves, since there’s no built-in, direct, or single-click path between the two ecosystems
- No ongoing sync—even after a successful migration, Gmail and Office 365 mailboxes won’t stay synchronized; it’s a one-time process that would need to be repeated to stay current
Why Do We Need a Dedicated Tool?
None of these manual methods are unsuitable for a Google Takeout to Office 365 migration. But converting a large number of files is not possible. The same few issues are typically encountered when using the manual method to migrate Google Takeout MBOX to Microsoft 365:
- Nested labels lose their hierarchy once they’re compressed into MBOX.
- PST import behaves differently depending on which Outlook build you’re running.
- None of the native methods handle more than one mailbox at a time.
That’s exactly why a dedicated tool becomes the practical choice.
How is the Aryson MBOX Migrator Tool Different?
The Aryson MBOX Migrator is built to migrate Google Takeout MBOX files to Microsoft 365, working directly on the MBOX file you’ve already downloaded so the process never touches a live mailbox. Instead of hand-converting files label by label with unreliable free converters, it handles the entire batch in a single conversion pass—preserving nested folder hierarchies, retaining attachments, and giving you control over filters and output before the data ever reaches Outlook or the compliance portal. That single pass is the step you run right before you import Google Takeout emails to Office 365, and it’s what turns a fragile, multi-stage manual workaround into one reliable, repeatable operation—whether you’re migrating a single mailbox or an entire organization’s worth of data.
Key Features of the Aryson MBOX Migrator Tool
To Transfer Google Takeout Data to Office 365. Here are some of the various features that are provided by the software:
- Supported email formats: Supports email clients such as Microsoft 365, IMAP Server, Outlook (Microsoft 365), Gmail Workspace, GoDaddy, etc.
- Folder and structure preservation: You are provided with two choices: “Follow Tree Hierarchy” and “Mapped with default mailbox.”
- Filters and preview: Filter by date range or folder, and set custom folder names.
- Duplicate Removal: You get the option to skip existing imports.
- Attachments: You can either export attachments with the file, exclude them, or export them separately
Note: However, following the above steps to migrate Google Takeout emails to Office 365 will accomplish the required task. There is more offered by the software. Therefore, it’s recommended to follow the detailed guide of the Aryson MBOX Converter Tool. This helps in understanding the features and working of the software before running a large-scale migration.
How to Use the Aryson MBOX Migrator Tool
For an efficient exporting of the MBOX file to Outlook 365, follow the steps below.
- Download and install the Aryson MBOX converter tool with admin rights.
- In the left panel, choose to select the MBOX files or select the MBOX folder, then browse to your folder.
- After selection, click on “Select all” for options, then proceed.
- In the left panel, your folder structure will appear; open subfolders and select your files, then click Proceed.
- From above, select the export to email client option.
- Select OAuth 2.0 for authentication, enter your credentials and log in, then from the right drop-down, choose Microsoft Office 365.
- Apply filters, start the migration, and after completion, verify the files.
Manual Methods vs. the Aryson MBOX Converter Tool
Here is a side-by-side comparison of how the manual method differs from the conversion tool method. Also, how both methods are suitable to migrate Google Takeout emails to Office 365.
|
Capability |
Aryson MBOX Converter Tool |
Manual Method |
|
Batch conversion |
Multiple MBOX files in one run |
One file at a time |
|
Folder structure preservation |
Nested labels stay preserved. |
Sub-labels often collapse or duplicate into “All Mail.” |
|
Attachment handling |
Retained with the original content |
Frequently dropped, mainly large files |
|
Output format options |
PST, EML, MSG, PDF, etc. |
Only PST |
|
Cost |
Free Version Available |
Free |
Conclusion
There isn’t a single-click option to import Google Takeout emails to Office 365, whether you go the manual route or opt for the dedicated software. For a smaller number of mailboxes, the Google Takeout method is a good choice as a free option. But for a larger number of mailboxes for the whole organization, or if the manual method doesn’t work properly. Using the dedicated tool for exporting to Microsoft Outlook 365 is generally a practical choice to keep the structure the same and make the migration smooth.
Frequently Asked Questions
Q1. How to migrate Google Takeout to Office 365 in bulk?
Ans. If you are choosing a manual route, then it’s not possible. But if you are choosing the Aryson MBOX converter tool, then it’s possible. As it allows you to do batch conversion, so every MBOX file from Google Takeout can be exported and converted.
Q2. Is it possible to directly import Google Takeout MBOX files into Office 365?
Ans. Actually, no, there is no direct option for conversion. You have to divide the whole process into two parts. The first part is to get MBOX files from Google Takeout and then use the Aryson MBOX Converter tool to export them into Microsoft Office 365.
Q3. Why doesn’t my Google Takeout show up correctly after importing into Office 365?
Ans. There could be various reasons for data to be misinterpreted.
Stopping the migration process in between.
Incorrect or no mapping of folders.
Migration to a different client rather than Microsoft 365.
Not a proper export of MBOX files from Google Takeout
Q4. Can Gmail and Office 365 mailboxes stay synchronized after migration?
Ans. No, because the process of exporting MBOX files from Google Takeout and then using the Ayson MBOX Converter tool to export into Microsoft Office 365 is a one-time process. So, to keep it consistent, you have to repeat the process again and again.
Q5. What data can I migrate from Google Takeout to Office 365?
Ans. You can migrate emails, attachments, folders, and other mailbox data stored in the Google Takeout MBOX files. The available data depends on what was included when you created the Google Takeout export.
Q6. Does the Aryson MBOX Converter preserve the original folder structure during migration?
Ans. Yes. The tool is designed to maintain the existing mailbox folder structure while exporting MBOX data to Office 365. This helps users access migrated emails in an organized manner after the migration.
About The Author:
Harshita Sachdeva, a professional technical writer at Aryson Technologies, specialize in delivering clear, hands-on documentation for data management, migration, and recovery solutions. With a meticulous, reader-first approach, I break down complex technical processes into simple, actionable content - helping IT professionals and decision-makers tackle challenges efficiently.
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