Tips to Fix “Unable to expand the folder..” Error in MS Outlook

24 Jul
Unable to expand the folder.

Unable to expand the folder.

There is no doubt that MS Outlook is a widely used email client in which all users’ mails and other data are stored in a Personal Storage file (.pst). The PST file contains the profile settings, rules and Outlook configurations along with all the mail folders. Sometimes, this PST file gets damaged, after which neither the mails nor any other mail object can be accessed from the troubled Outlook. For such cases of data loss or inaccessibility, there are many PST file recovery software available in the market, which can help recovering the emails and other mail objects safely.

If the Outlook PST file has been corrupt, the Outlook behaves abruptly and chances are high that you may not be able to access the mail objects. In such situations, the Outlook shows various error messages on the screen, one of which can be read as below:

“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.”

In order to repair the corrupt PST file, Microsoft Outlook provides an inbuilt utility, called the Inbox Repair Tool or Scanpst.exe. This application is installed in your Windows hard drive along with the Outlook application. You can run the utility and recover the mail objects by repairing the corrupt or damaged PST file. Below steps will give a clear idea on executing the repairing operation:

Steps to repair corrupt Outlook PST file using the Inbox Repair Tool –

  • In your windows system, go to ‘Start’ > ‘Run’
  • Provide the path of the Inbox Repair Tool (Scanpst.exe) by typing in drive_name:\Program Files\Common Files\System\Mapi\LocaleID\scanpst.exeand click OK
  • A dialog box opens. Provide the file name and path of the same, which you want to scan. Click the ‘Start’ button.
  • Once the scanning process gets complete, select the option, ‘Make a backup of the scanning file. Click the ‘Repair’ button

If after performing the above operation, the problem still persist and you fail to access mails from the Outlook, go for any third-party PST repair utility. Those utilities are specially designed to repair even the severely corrupt Outlook PST files and restore the mail components back. Moreover, these utilities contain simple user interfaces and can be easily used, without any technical assistance.


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