MailsSoftware OST converter can be trusted to repair corrupted OST files and export Outlook OST in PST, EML and MBOX formats. Outlook is the best email client for sending and receiving emails, calendars and tasks, as well as contacts, in OST and PST format. When the email account is configured with MS Exchange server, and the cache exchange mode is checked, an OST file is created. The OST file stores all mailbox data in a structured format. Sometimes, the OST file is not accessible or cannot be opened due to Virus Attack, Hardware problems or Modifications in MAPI addresses or Exchange server crashes down. There is no way to view or open OST file mailbox data. To make OST files readable, you will need third-party software. To recover corrupted Outlook Outlook OST file data and complete mailbox data, download MailsSoftware OST tool.