A smart way to exchange OST for PST is to use software which is highly recommended by the professionals like Data Recovery Freeware OST Converter. This OST to PST converter allows you to convert OST files into multiple OST files in bulk without any restrictions this tool allows you to convert OST to PST, MBOX, DOC, DOCX, HTML, MHTML, PDF, etc. However, this tool migrates the OLM file to a number of email clients like Gmail, Yahoo mail, Thunderbird, IMAP, etc. It also maintains the data hierarchy throughout the conversion process. It is also compatible with all versions of Outlook and Windows. 

Steps to exchange OST to PST in windows

- Download and install the OST to PST converter.

- Then select the OST file to convert. 

- After this select the file and folder to preview.

- Now select the file format to convert. 

- Lastly click on the convert button to start the conversion process.