This article tells everything about an offline OST file, personal storage PST file and exporting an offline OST file to PST file including all email items and their properties.

OST (Offline Storage Table) - It is offline data of Exchange Server which is synchronized with MS Outlook and stores in client machine that keeps all copy of Outlook emails in database.

PST (Personal Storage Table) - It is personal data of MS Outlook that stores all personal data and emails with all email properties.

Key Role of OST File

An OST file most important data for Outlook email client. It stores entire Outlook mailbox, therefore users can recover it as PST format. As you know that an offline OST file does not open in MS Outlook mailbox. But on the offline Exchange Server you can export it into PST format then open with Outlook mailbox.

How to Export an offline OST file to PST format?

There are two option (1. Manual Method 2. Third Party Tool ) to export an offline OST file to PST format.

Manual Method:

  • Open Microsoft Outlook.
  • Click --- File option then Archive.
  • Select -- the file or folder to Archive.
  • Browse-- the location to Store the Archived file in .pst.
  • Click finish.

Note: If your OST files are highly corrupted then try third party OST to PST tool to easily export an offline OST file to PST format with all email properties.

  • Select or Browse OST file
  • View Emails with Items and Attachments
  • Export OST file to PST format.