How to Import Outlook to Thunderbird for All Data Types?
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Migrating your emails, contacts and calendar from Outlook to Thunderbird is much simpler than you think. We have two proven approaches to complete the migration process; you can choose any one of the two.
The free method uses Thunderbird’s built-in import tool to transfer data directly from a Classic Outlook profile. It works best for small to medium-size mailboxes to import contacts and emails from Classic Outlook to Thunderbird in one go.
For faster and more accurate migration, a dedicated Outlook to Thunderbird migration tool can import all your data: emails, contacts and calendar directly in a single pass.
Both methods preserve the folder hierarchy and allow a one-time import. They never create a live sync between Outlook Classic and Thunderbird. Choose the free approach for small mailbox migration, or the pro method for speed, bulk processing and convenience.
Outlook Vs Thunderbird: Why Do Users Migrate?
- Saves Money: Thunderbird comes with a lifetime free license and updates, while using Outlook you should have a Microsoft 365 subscription, or a one-time Office purchase to use.
- Lightweight and fast: Thunderbird is developed and engineered by highly skilled open-source community engineers around the world. Its lightweight architecture runs faster and smoother than Outlook, especially on low-spec systems.
- Privacy Focused: Thunderbird is a desktop-based email client that never mines your mailbox data for advertising purposes.
- Free Add-ons: With Thunderbird, you have a large library of free extensions that let you customize your Thunderbird environment with a Calendar tool and advanced filtering.
- No Vendor Lock-In: In Thunderbird, your emails, contacts, and calendar remain open to export in a globally standard format, which lets you have complete control over your data.
Essential Checklist Before Importing Outlook to Thunderbird
- Classic Outlook & Thunderbird Installed: For seamless working of the manual approach, it is necessary to have updated Outlook Classic and Thunderbird installed on the same device.
- Live Classic Outlook Profile: Thunderbird’s built-in import tool fetches data from a live Outlook profile; without a configured profile, the manual method will not work.
- 32-bit/64-bit Version Consistency: Thunderbird and Outlook versions must match the same bit architecture installation; without it, you may see the Outlook import greyed out.
- Sufficient Disk Space: Ensure you have sufficient free disk space for the storage of Outlook emails, contacts and calendar when imported to Thunderbird.
- Outlook Mac, Web/365 Users Note: The manual approach works with Outlook Classic for Windows. For Mac Outlook, you need to import OST to Thunderbird. For migrating Outlook web to Thunderbird, consider using the Outlook.com backup tool.
How to Import Outlook Data to Thunderbird Manually?
Now that you have checked and marked the checklist, here are the dedicated steps for how to import Outlook emails, contacts, and calendar into Thunderbird using its built-in import tool.
Emails and contacts can be imported together in one go directly from the Outlook profile without any export steps needed.
Calendar is handled differently by the Thunderbird import tool and can’t be read directly from the Outlook profile. For importing the calendar, first export it from Outlook and then import the file into Thunderbird separately in standard calendar format.
Below are the working steps for all three methods to transfer Outlook emails, contacts and calendar to Thunderbird. For complete migration, follow the three-method approach in order, or directly jump to one which required.
1 Method: Migrate Email from Outlook to Thunderbird
- Run Thunderbird, from menu bar select “Tools”, and then choose “Import”.
- After that, choose “Import from Outlook” and click “Continue”.
- Select the “Mail Messages” option from the Import window and continue.
- Click the “Start Import” button to import Outlook to Thunderbird.
- Wait for the Outlook emails to Thunderbird import process to complete & press the “Finish”
2 Method: Transfer Contacts from Outlook to Thunderbird
- Open Thunderbird and go to the “Tools” option in the menu bar.
- Next, click on “Import” and select the “Import from Outlook” radio button.
- Then, click “Continue” and check the “Address Book” option > “Continue”.
- Finally, click on “Start Import” > “Finish” to transfer contacts from Outlook to Thunderbird.
3 Method: Transfer Calendar from Outlook to Thunderbird
- Open Outlook Classic on your desktop and go to the Calendar
- Now, select the required calendars to export and go to the File
- Next, click on Save Calendar > More Options > Select Date Range.
- Then, click OK and select Save to export Outlook calendar
- After that, run Thunderbird and go to Tools > Import.
- Choose Import from a File > Import Calendars > Continue.
- Thereafter, select the calendar file exported in step 4.
- Next, select the Calendar item to import > Continue.
- Now, choose the destination for Calendar import, an existing account or create a new Calendar.
- Finally, press Continue > Start Import and click Finish to transfer the calendar from Outlook to Thunderbird.
Limitations of Manual Outlook to Thunderbird Migration
- Probability of Data Duplication: If you try to reimport Outlook data to Thunderbird when stuck, then the manual import will create duplicate emails in Thunderbird.
- Read/Unread Status Not Preserved: During manual import of Outlook data to Thunderbird, your Outlook emails’ read/unread status will not be preserved in Thunderbird.
- Not Suitable for Large Mailboxes: There is a chance that with large mailboxes, your Thunderbird might get stuck or get crash.
- Technically Demanding for Non-Tech Users: Some non-technical users may find this free approach tech-heavy and unfavorable to execute.
Common Errors When Importing Outlook to Thunderbird Manually & Fixes
- Thunderbird Outlook Import Button Greyed Out: Check you Outlook and Thunderbird versions are the same bit architecture; if the installation bit architecture is mismatched, then you will see the Outlook import button greyed out.
- No Profile Found/ Can’t Locate Outlook: This issue often occurs when the Outlook profile is corrupted, or there is a permission issue. Running Thunderbird as administrator and repairing the Outlook profile can fix it.
- Missing Emails or Partial Import: This is a common error where the manual method fails when importing. It often occurs if the import process gets interrupted. Try again and do not use the device till the process is completed.
- Thunderbird Crashes When Importing Data from Outlook: This is a common issue when executing the import process on low-spec systems or for large Outlook mailbox data. To overcome this error, a dedicated Outlook to Thunderbird migration tool is more suitable.
Outlook to Thunderbird Converter to Transfer All Data at Once
If you find the manual method involves too many steps, feels too technical, or doesn’t fit your requirements, the BitRecover PST File Converter is the pro solution for you. This standalone dedicated utility can transfer emails, contacts, and calendars from Outlook to Thunderbird in a single go.
Additionally, this software is technically designed to directly import Outlook data to Thunderbird’s Local Folders for all mailboxes of any size- single or multiple. Anyone can download this easy-to-use Outlook to Thunderbird converter trial version to check the features and ease-of-use capability of this program.
How to Import Outlook Data to Thunderbird Using Converter?
- Initially, install and run the Outlook to Thunderbird migration tool.
- Select the option to Convert Data from Configured Outlook profiles & click Next.
- Next, select the Outlook data folders to include emails, contacts, calendars, etc.
- Then, choose Thunderbird as the destination from the saving option list.
- For selectively importing Outlook data to Thunderbird, use filter settings.
- Finally, click on Convert to start the Outlook data to Thunderbird import process.
Why Choose Pro Outlook to Thunderbird Converter?
- Select Outlook Data Folders Before Importing: The software approach for migrating Outlook to Thunderbird allows you to select Outlook folders from the inbox, sent, contacts, calendar, etc.
- Apply Filters to Control What Data Will Migrate: For more granular and selective Outlook data to Thunderbird migration, use To, From, Subject, and date-based advanced filters.
- Easy to Use, Self-explanatory UI/UX: The pro approach utility user interface is so easy to use that a user with minimal technical knowledge can also run the software.
- Preserve Read/Unread Status After Importing: Unlike the manual method where your read/unread emails are imported as unread regardless of the original status, the expert tool preserves the read/unread status.
- Get Saving Log Report When Completed: After completing every import cycle of Outlook data to Thunderbird, the software automatically generates a saving log report file to record that all data items are imported successfully.
- No Data Alteration During Migration: Your emails, contacts and calendar events are converted as they are with complete folder structure, formatting, etc
Bonus Tip: Alternate Route If You Don’t Have Outlook Installed
If you do not have Outlook installed and have PST files, then a converter tool can work for this situation. This utility can directly migrate them to Thunderbird without needing Outlook installation. To have clear import steps, follow the BitRecover guide to import PST to Thunderbird, which is drafted to describe how to import all items from Outlook data files into Thunderbird.
Conclusion
To sum up the above blog on the topic of how to import Outlook data to Thunderbird, we have discussed two free and pro techniques. The free method works well if you are migrating a small to medium-sized Outlook mailbox to Thunderbird and are willing to follow manual steps. However, keep in mind the limitations of data duplication, which will not carry read/unread status, and a greater chance of migration failure if things go wrong.
Secondly, the Pro approach directly migrates your Outlook emails, contacts and calendar to Thunderbird in a single pass with no limitations. However, the right choice depends on your mailbox size, comfort with manual steps, or selective migration. Both methods are capable of transferring complete Outlook data into the Thunderbird environment.
Common FAQs
Q1. What Transfers from Outlook to Thunderbird via the Free or Pro approach?
Ans: Both the Thunderbird built-in import tool and the Outlook to Thunderbird migration tool transfer emails, contacts and calendar Outlook data into Thunderbird.
Q2. Which one is better, Outlook or Thunderbird?
There is no single answer to who is better; it completely depends on your needs. Outlook best fit for professionals due to its integration with other Office 365 apps. On the other hand, Thunderbird is best for free, private, lightweight, fast, etc features.
Q3. Can I migrate multiple Outlook profiles into Thunderbird?
Yes, you can re-run the Thunderbird import tool to import multiple Outlook profiles to Thunderbird. However, to import multiple Outlook profiles into Thunderbird at once, a dedicated converter tool is often recommended.
Q4. Can I keep Thunderbird and Outlook Classic in sync going forward?
No, both the manual and paid approach will work for a one-time import only and do not create a live sync. To continually receive new emails in Thunderbird, configure your account via IMAP.
Q5. Will my Outlook rules and filters transfer to Thunderbird?
No, none of the free and pro techniques will carry your Outlook rules and filters to the Thunderbird profile due to Thunderbird environment functionality limitations.
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