For a variety of reasons, both individuals and companies sometimes have to migrate from Outlook to Thunderbird, Apple Mail, or another email tool. Sadly, there is no simple approach to convert your OST files to MBOX format. 
Calm down! Still, some techniques could be able to convert OST to MBOX. We shall discuss those techniques in this work. Please keep reading.

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What  is OST And MBOX Files?

Usually related to Microsoft Outlook are OST files. OST goes for "Outlook Offline Storage Table". Outlook uses this data file whether working with an Exchange Server account offline or in saved Exchange mode. 
But MBOX is a general term for a type of file used to store emails. Like text messages, this is a prevalent method of storing data. A couple email programs save data in MBOX format. Among these are Apple Mail, Mozilla Thunderbird, and several iterations of Microsoft Outlook.

Why Convert OST To MBOX?

1. You can switch from Outlook to email programs compatible with MBOX files, such Thunderbird or Apple Mail.
2. Two many email applications and operating systems can read the MBOX format. Conversely, OST files can be difficult to obtain.
3. Provides simpler access from Exchange Server to non- Exchange email apps.
4. Turning OST into MBOX is another better and less expensive means of backup. 

How Would One Convert OST Files Into MBOX Files?

Generally speaking, manual approaches are not able to properly translate OST to MBOX. Still, we can move the data that way and link several email clients to one another. 
For this we shall employ Outlook and Thunderbird email programmes. We dissected the procedure into manageable steps so that following and understanding would be easier. They are found here:

Transfer Your OST Mailbox To A PST.

1. Opening Microsoft Outlook on your phone or computer 
2. Go to the File menu following that and under "Open & Export," under "Import/Export."
3. "Export to a file."
4. Click "Next," then choose "Outlook Data File (.pst." Search for and click 
5. Select the mailbox folder from the OST file you want downloaded.
6. Choose a location to save the PST file; then, hit "Finish." 

The OST file now resides in PST instead. Thunderbird allows you to import PST files, hence you might import them straight away. This can be done automatically if you utilise the DataVare OST for PST Converter programme. Your OST files will be converted to PST files with a few clicks.

Configure And Install Thunderbird:

1. Mozilla Thunderbird is easily obtained and set up if you do not already have it.
2. Check that Thunderbird is configured using your email addresses. 

Thunderbird comes free for you. It is not something you have to pay for. The Thunderbird email client can be located with Google; download it from the official page. One may rely absolutely on it.

Into Thunderbird, Add A PST File:

Following your Thunderbird email account setup, perform the following: 
• Under "Tool," click "Import."
• Select "Mail" then click "Next."
• Click "Next" after selecting "Outlook."
• Click on the PST file you formerly stored from Outlook.
• Use the on-screen directions to lastly complete the import procedure. 
After importing the PST file into Thunderbird, you ought to be able to access all the data in that Outlook mailbox.

Changing Thunderbird Mail To MBOX: 

• After importing the PST file into Thunderbird, you ought should be able to view your Outlook emails there.
• Add to Thunderbird the "Import Export Tool NG" add-on. This add-on lets you export emails into MBOX files.
• After configuring the add-on, select the files or emails you wish to MBOX from.
• Press the correct mouse button to either "Export Folder" or "Export Selected Messages."
• Click on "Export to MBOX file" then select a place to save the file.

Your Outlook emails ought to be MBOX formatted at this time. Though the process takes some time, it is free.

Expert Techniques for Converting OST To MBOX

Regular conversion of OST files to MBOX files will make this easier with  DataVare OST to MBOX Converter program. Furthermore, the full transfer process will be carried out automatically. You need not use more than one email program to migrate emails from one to another. 

Here are some advantages if you convert MBOX using a professional OST: 
1. Ensures information is secure. Not one of your vital records will be lost.
2. Can many files at once be convertable. Users may therefore convert multiple OST files into the MBOX format.
3. Has a simple design ideal for those lacking tech knowledge.
4. Certain OST to MBOX converter software enable users modify aspects of the transfer including which directories to utilise, how files should be labelled, and more.
5. Usually able to handle large OST files, these program provide seamless transfer.

Conclusion

Converting OST to MBOX would help you to migrate from Outlook to Thunderbird. There are not any free methods, nevertheless, for directly converting OST or PST to MBOX. In this instance, any professional program will help you to simplify the work. 
Always remember to first create a copy of your data regardless of the way you leave Outlook.