Install and Run OST Recovery Software and Select the Add File Tab and Choose the "Select File" Option.
Choose the "Search File" Option - If You Want to Convert Multiple File.
Remove S/MIME and OpenPGP Encryption.
Select Scan Mode - Quick and Advance
Start the Scanning Process of OST File.
Scanning Process - Completed Successfully - Save Scaned OST Files.
Click on "Export" button of Menu bar to Migrate the All Items from the OST File.
Export OST Data into PST, Office 365, HTML, EML and MSG Formats.
Showing the Export Process Now.
Export Process - Completed Successfully.