How to Migrate Thunderbird to Office 365? A Complete Guide

Looking for an easy way to migrate Thunderbird to Office 365? This guide has got you covered. In this article, we will provide you with all the best methods including an instant automated solution and free manual approaches to help you perform a smooth and secure migration.

No doubt, it is a tedious task to perform Thunderbird to Office 365 migration amongst different users. As we are pretty much aware, Thunderbird is a desktop-oriented email client but provides only basic features for communication purposes. On the other hand, Office 365 is an online business suite, which renders a bunch of advanced features.

That is why users choose to import thunderbird to outlook 365 for advanced collaboration features and productivity tools. This post covers everything in a very clear and detailed way. Let’s start.

Best Thunderbird to Office 365 Migration Solutions

Here come some proven and reliable workarounds to migrate Thunderbird to Office 365 seamlessly. All you need to do is simply follow the below-mentioned approaches carefully.

Approach 1: Perform Thunderbird to Office 365 Migration – Instant Technique

One can smoothly convert Thunderbird files to Office 365 using the best and top-notch Thunderbird converter tool that help user’s in  MBOX to Office 365 Migration. It is an advanced utility that lets users migrate emails from Thunderbird to Office 365 in bulk using Add File(s) or Add Folder option. Besides normal migration, it also allows exporting the emails by specifying the date range in the given mentioned date range. In addition to that, the software is also capable to maintain the same folder hierarchy of the MBOX file in the Office 365 account.

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Pros

• Completely 100% safe automatic solution
• Support Windows 10 & below OS versions
• Self-guided with the simple framework
• Fast and secure migration
• Do not require the installation of Mozilla Thunderbird

Cons

• Not available for Mac Operating system.

Simple Steps to Migrate Thunderbird to Office 365

• Step 1: Run Thunderbird to Office 365 migration tool.
• Step 2: Choose ‘Add Files‘ to import Thunderbird MBOX files.
• Step 3: Select ‘Office 365‘ as destination.
• Step 4: Map O365 mailbox with added Thunderbird mailbox.
• Step 5: Hit ‘Export‘ to finish migration.

There are two ways to enter O365 mailbox ids during mapping. This makes the migration to be performed in two ways:

I. With Impersonation –

II. Without Impersonation –

How to Export Emails from Thunderbird to Office 365? Manual Ways

Here in the below sections, we have mentioned some manual techniques to migrate Thunderbird to Office 365. These are free methods but hold some limitations that you should know, we have stated those drawbacks as well. Keep reading. 

Approach 2: Configure Office 365 Account in Mozilla Thunderbird

In case if Thunderbird application is installed on your system, then it’s easy to perform Thunderbird to Office 365 migration. Following are the steps to connect Thunderbird to Office 365.

1. Launch Thunderbird application and navigate to Tools>> Account Settings option.
2. From the Account Settings wizard, click the Account Actions button from the right-bottom corner and choose Add Mail Account option.
3. In the next windows, you need to provide the credentials of the Office 365 account and click Continue to proceed further.
4. Now, if you directly hit the Done button, then you will receive an error message. In order to avoid this, click on Manual Configure option.
5. Next, you need to provide the following details in the new Mail Account Setup window:
   • Incoming: IMAP| outlook.office365.com| 993| Autodetect
   • Outgoing: SMTP| outlook.office365.com| 587| Autodetect
6. Once the process is done, hit the Re-test button followed by clicking the Done button to process Thunderbird to Office 365 migration.
7. Now, wait until all emails and mail folders of Office 365 get synced with Thunderbird application.
8. After that, just drag the data from Thunderbird profile and drop into O365 folders.
9. Repeat the above step until all the emails get transferred from Thunderbird to Office 365 account.
10. Now, delete the Office 365 account by clicking on Tools >> Account Settings >> Account Actions >> Remove Account.

Pros

• A free of cost solution

Cons

• Only applicable when Thunderbird application is installed
• It consumes sufficient users’ time and efforts
• Technical knowledge is required

Approach 3: Convert Thunderbird data & Import into Outlook 365 Account

Users can also convert the Thunderbird data file (MBOX) into an equivalent Outlook PST file. This can be done through manual or automatic techniques. For this, you can go through Thunderbird to PST Converter. After that, import the converted .pst file into O365 via PowerShell method or Exchange Admin Center. This is a good alternative means to migrate Thunderbird to Office 365.

Pros

• Users can use the Thunderbird email into Outlook as well as in Office 365 application

Cons

• Requires introduction of MS Outlook email clients
• Any mistake in the process leads to data loss or corruption
• Sufficient amount of time required for this conversion

Frequently Asked Questions

Time to Wind Up

If you are running a business and want to migrate Thunderbird to Office 365, then it is advised to download the third-party solution i.e., Ist Approach. It is an easy-to-use software that migrates emails from Thunderbird to Microsoft 365 in a matter of minutes. Furthermore, it provides a 100% migration rate with no data loss or corruption issues.