Microsoft Outlook is extensively used and the most preferred email client application amongst various other email applications. Outlook uses two types of supporting files in order to store the Outlook data, OST (Offline Storage Table) and PST (Personal Storage Table) file. Of these two, the OST file is used to work in the offline mode, that is, when there is no Internet connection. Using OST files, you can work in the offline mode and synchronize it with the Exchange server once the connection is restored. At times, the OST PST file gets corrupt because of various unknown like virus infections, power outages, Trojan infection, header corruption, etc. In such cases, you should try to repair the OST file. You can use Scanost tool however, if you are unable to repair it with this tool, then you should convert OST file to its equivalent PST with some most popular software for OST file to Outlook file conversion. Let’s discuss it by Undertaking a Scenario: Suppose you are using Outlook 2003 and when you make an attempt to start it fails to start and an error is displayed: ‘Cannot open your default email folders. The file xxxx.ost is not an offline folder file.’ What’s the Cause for Error Message? For the above mentioned error message there are various reasons like:
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