OST File in PST - Version 3.5 OST File in PST Tool is also very much simple in its working and get accomplished in just two three steps. The software can convert Exchange OST to Outlook PST or Outlook MSG or Outlook Express EML. Using this tool you can retain original RTF as well as HTML formatting. The software is adept in saving your email environment in case Server is crashed and all the users need access emails. You can easily convert your unusable OST file to Outlook PST even in the case of Exchange user mailbox account accidental deletion. Our software OST File in PST runs all windows version such as Win 98/2000/2003/XP/ME/NT/Vista and Win 7. You can purchase Software full version online by paying $99 only. http://www.osttopstconversion.us/