The trend of converting an OST file to pst format is on its peack. There are lots of third party tool developed and available on the online market. I highly recommends Shoviv OST file Converter for inaccessible or orphand OST files.
Here I mentain top 5 OST to PST Converter tool you can use for your OST file conversions.
1. Shoviv OST to PST Converter
2. Bitdataconversion OST to PST Converter
3. Weeom OST to PST Converter
4. Stellar OST to PST Converter
4. Sysdaddy OST Converter
