Open OST into MS Outlook - Version 3.6 If any user want to Open OST into MS Outlook, read our guidelines with operating OST to Outlook Opener program. Because of restriction in Miocrosoft Outlook, it doesn't allow user to manually open OST file into Outlook for orphane files. In this situation our OST Recovery tool performs at its best. OST file is routinely shaped and data from the exchange server is downloaded. User can move this OST file from one place to another place but cannot read it & cannot Open OST to MS Outlook manually.OST files are used when the user has an Exchange server account and a desire to work offline or utilize the non-payment Cached Exchange Mode. Cached exchange mode refers replica of users exchange server account mailbox which is saved on local computer. This replica of offer quick access to the database, including when user effort offline mode, and is synchronized with the exchange mail server. If this replica corrupted & user require some necessary documents or files at that time no alternative or solution helps to user to recover