Some of the common causes to extract email from an OST file are if you are interested in formulating a copy of the ost emails or if the ost file is orphaned and there is an urgent need for accessing the data.

When you have OST files in your system, first of all, you will have to convert OST to PST because it is almost foolish to think of extracting emails from an OST file directly.

To do this conversion process you have to use an automated converter tool like the SysInspire ost to pst converter tool.

By using this experienced third party tool you can easily perform this task without the Outlook installation.

Install and run the tool to get the ost file converted to pst

Then, select OST files from the Select Files option.

Immediately, click on the Convert button to start the conversion process.

 Next, click on the Browse button to select the destination location for the output file.

After file conversion, you can flawlessly extract data from this converted pst file. Also, you can access converted data into Outlook 2019, 2016, 2013, 2010 and other lower versions.

More info:- https://www.sysinspire.com/ost-to-pst-converter/