Repair Pst (Outlook) file

Repairing a Personal Folders file (.pst)

You may need to use the Inbox Repair Tool if you open your Outlook .pst file and receive this message:

Unable to expand the folder. The set of folders could not be opened. Errors could have been detected in the file drive:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook\Outlook.pst. Quit all mail-enabled applications, and then use the Inbox Repair Tool.

For seriously corrupted PST files, try running Scandisk.exe (look under Programs | Accessories | System Tools) first, then Scanpst.exe, repeating 3-4 times until neither program returns an error. We've know this technique to restore data that the user though was lost forever.

Microsoft Outlook limits the size of Personal Folders .pst files and offline folders .ost files to 2GB. If a new or changed item increases the size over than limit, you will not be able to use the .pst or .ost file. Even if you delete items from the server mailbox, the .ost file will not synchronize. If you run the Inbox Repair Tool (Scanpst.exe), the file does not resolve the problem. To resolve this problem, download the crop tool from the Microsoft Website or Download & Install a Recovery PST Software.

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