Re-occuring .ost file corruption

Discussion in 'General Computing' started by medardtaber, Jun 24, 2015.

  1. medardtaber

    medardtaber New Member

    Jun 24, 2015
    Likes Received:
    We have a practice wide re-occuring issue in which users .ost files become corrupt.

    See error:

    "Unable to open default email folders. The file C:\\microsoft\outlook\outlook.ost is not an offline folder."

    We are on Outlook 2007 (12.0.6423.1000 SP2 MSO), office 2007. Occurs on different PC's & laptops, happens on 32-bit and 64-bit OS.

    We know that deleting the .ost file or re-creating the mail profile will fix this issue, however, we have numerous Users around the world, which this is not an option. Moreover, this is a re-occuring issue and want to get to the problem rather than the work around.

    Advice and Suggestions are welcome!
  2. tommypalmer

    tommypalmer New Member

    Jun 26, 2015
    Likes Received:
    1. Open Microsoft Outlook. On the "Tools" menu, select "Email Accounts." Choose "View or Change Existing E-mail Accounts," and click "Next."

    2. Select the Exchange Server, click "Change" and then click "More Settings." Click "Manually Control Connection State" so that Outlook will start offline the next time it is opened. Click "Work Offline and Use Dial-up Networking" so that it will not try to connect to the server. Close Outlook.

    3. Open Outlook again. Select "Work Offline" at the prompt. Select "Services" from the "Tools" menu. The "Services" dialog box will open.

    4. Click the "Add" button on the "Services" tab of the "Services" dialog box. Select "Personal Folders" and then click "OK."

    5. Enter a name for the folder, and select the Desktop as the location. Click "OK" to select default settings. Drag the "Personal Folder" from the Outlook window to the new folder to move OST files to the personal folder. When the computer syncs with the server, all of the OST files can be copied there.
  3. Voimakas

    Voimakas New Member

    Oct 8, 2016
    Likes Received:
    Repair OST file using either manual process or third party tools
    Manual Process-
    • Open MS Outlook.
    • Click the File menu.
    • Select the “Import and Export” wizard or press 't'.
    • From the list, click the “Export to a file” option and then click Next button.
    • Selected items to be exported or Click on parent root and check the Include sub-folders option.
    • Browse and select the target folder for saving the email items.

    Try OST Recovery tool to easily repair corrupted offline OST file and export into MS Outlook PST file.

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