Sometimes, due to some reasons, users want to change Outlook OST file format to Windows 10 mail, but users cant do this in an easy or direct way. So users need any software, that makes this work easy and gives the best result. I suggest using eSoftTools OST to PST Converter Software for changing Outlook OST file format into Windows 10 Mail. The software fully recovers any deleted or OST files and saves all the files into Windows 10 mail account. It gives the best benefits for every user and makes the conversion is too authentic.