Best Method to Convert OST to EML?

Method 1. Using Microsoft Outlook (Manual Method)

The manual method of converting OST to EML using Microsoft Outlook involves accessing mailbox data directly through an active Outlook profile linked to the OST file. Since OST files are synchronized with an email account, Outlook allows users to view and manage stored emails, making it possible to manually extract and convert them.

• Install and open Outlook
• Select the emails or folders
• You want to export
• Drag the emails to your desktop
• They will save as.MSG file
• Convert.MSG to .EML
• Use the MSG to EML converter tool
• And Drag into Thunderbird
• Save as EML

Method 2. When the OST file is offline

When the OST file becomes offline or inaccessible within Microsoft Outlook, it means the file is no longer actively synchronized with its original email server or Outlook profile. This situation commonly occurs due to account removal, server issues, or changes in system configuration.

In such cases, direct access to the mailbox data through Outlook is not possible, making manual export methods ineffective. Therefore, specialized approaches such as using the OST Converter Tool are required to retrieve and convert the data stored in the offline OST files.