Look like you are at the correct place, sometime the OST files get damaged and become inaccessible, also the manual method won’t work, for this, you can use the best professional method for OST File recovery i.e,
Exchange OST Repair Tool.
There are multiple advantages of using Exchange OST Repair Tool.
. Easy recovery of email.
. Corrupt OST data files will recover and repair successfully.
. Multiple options to save recovered OST data files into PST, MSG, EML, DBX, MBOX, etc.