Microsoft Outlook uses two file types for holding message, calendar, task and notes data: PST and OST files. PST files are created in the user's computer for non-Microsoft Exchange accounts ...

When dealing with inaccessible OST (Offline Storage Table) files, finding the right tool is essential. I recently encountered ...

The issue may also appear if there’s something wrong with the Outlook Data files (.pst & .ost). These files save messages and other Outlook items (such as calendar events) locally on your PC.

ATS OST to PST Converter Software has complete solutions to recover unreadable Outlook OST file into Outlook PST file with data as well and imported all items into Office365 and Exchange Server.