The answer how to migrate Outlook MSG files so that they can be accessed out of MS Outlook lies here. User GainTools MSG Converter Tool and follow the discussed steps.
First Download Free Software from GainTools MSG Converter Official Page and install in any Windows OS.
Firstly, download and install MSG Converter on your Windows machine. It takes a few seconds.

MSG Converter Software Interface
Once the software is launched, you will find two options โ File or Folder. Select an option and then go to the Browse button which helps you to add Outlook MSG files on the software panel.

Browse MSG Files
The files are scanned by the application and then it shows a complete preview of Zimbra files.

Preview & View MSG Files
An Export window is opened where you will get various options to export such as PST, EML, EMLx, and MBOX. Choose a file format in which you want to export MSG files.

Select Exporting Option
Mention a location of your system using the Browse button to save the exported results.

Select Destination path
Now, finalize the conversion task by click on the Convert Now button. It hardly takes a few minutes to complete the conversion task.

Convert & Save
Your MSG files have been successfully converted to your desired format. You can now access your converted files from the specified location.