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When Outlook Overflows: A Deep Dive into Error 0x8004010d and Oversized PST

Outlook error 0x8004010d indicates a problem with not enough disk space or oversized PST data file. It occurs when accessing the mailbox or synchronizing the local data with the server.

The error message displayed on the screen reads: "An unknown error occurred, error code: 0x8004010d" or "reported error (0x8004010d): 'There is not enough disk space available for this operation." Understanding when the error appears and its causes can help users find a suitable solution to resolve the issue.

When does Outlook error 0x8004010d appear?

Outlook error 0x8004010d can appear in various situations, such as when a user is trying to send or receive emails, update Outlook, or synchronize mailbox folders. This error can also occur during the initial setup of an email account or when Outlook attempts to update the offline address book.

The reasons behind Outlook error 0x8004010d

  1. Not enough disk space. Lack of disk space on the local computer is the primary cause of the 0x8004010d error.
  2. Not enough space on the Exchange Server. When a mailbox limit is exceeded on the Exchange server, you may receive the 0x8004010d error message.
  3. Corrupted Outlook profile. Another frequent reason behind the 0x8004010d error is a corrupted or damaged Outlook profile. This could happen due to an unexpected shutdown, system crash, or other issues that may affect the integrity of the Outlook data file.
  4. Damaged or oversized PST/OST file. The 0x8004010d Outlook error is often caused by an oversized, damaged, corrupted, or missing Outlook data file.
  5. PST file grows more than 4Gb on the FAT32 drive. If your drive uses the FAT32 file system, the maximum file size of which is 4GB, Outlook error 0x8004010d is displayed.
  6. Incorrect account configuration. If the email account is not properly configured within Outlook, it may lead to the 0x8004010d error. Incorrect server settings or incomplete account setup can prevent Outlook from accessing the mailbox or synchronizing the data with the server.
  7. Network connectivity issues. A poor or unstable network connection may cause difficulties in synchronizing the local data with the server, resulting in the 0x8004010d error in Outlook. This could be due to problems with the user's internet connection, the email server, or a temporary disruption in service.
  8. Interference from antivirus or firewall. Sometimes, antivirus software or firewalls can interfere with Outlook's functionality and cause errors. Overly aggressive security settings or false positives could block Outlook from accessing the server or synchronizing data properly.
  9. Outdated or incompatible Outlook version. Using an outdated or incompatible version of Microsoft Outlook may lead to the 0x8004010d error. Certain features or functionalities might not work correctly in older versions, causing issues with mailbox access and synchronization.
  10. Improper migration or upgrade. When migrating from one email client to Outlook or upgrading to a newer Outlook version, improper migration or incomplete upgrade processes can lead to the 0x8004010d error. This is because some crucial settings or files might not be transferred correctly during the process.
  11. Add-ins or plugins causing conflicts. Some add-ins or plugins installed in Outlook could cause conflicts or compatibility issues, resulting in Outlook error 0x8004010d. These add-ins may interfere with Outlook's normal operation or cause errors while accessing the mailbox or synchronizing data with the server.

How to fix Outlook error 0x8004010d

To resolve the Outlook error 0x8004010d, follow these step-by-step solutions:

  1. Check disk space. To check the total disk space available on your Windows 10 device, open File Explorer, and then select "This PC" on the left.
  2. Check quotas on the Exchange Server. Quotas are used to limit the size of Exchange Server mailboxes. You can check the current quota in the Exchange Admin Center GUI (AEC) or by contacting your system administrator. Locate a user in the "Recipients" section, open the properties, and go to the "Mailbox Usage" section.
  3. Format FAT32 drive to NTFS in Disk Management.
    • Right-click "This PC" or "My Computer" and select Manage.
    • Open "Disk Management" in the Device Manager.
    • Right-click the required disk and choose Format.
    • Set NTFS as the file system, check Perform a quick format and click OK to confirm.
    Format NTFS drive using Disk Management
  4. Check network connectivity.
    • Ensure that your internet connection is stable and working correctly.
    • Try accessing your email through a web browser to confirm that the email server is functioning properly.
  5. Update Outlook to the latest version.
    • Open Outlook, click File > Office Account > Update Options > Update Now.
    • Follow the prompts to install any available updates and restart Outlook after the update is complete.
  6. Recover PST file.
    • You can use built-in Inbox Repair Tool (scanpst.exe) to repair your Outlook data file.
    • Restore PST from a backup copy by importing PST to Outlook with an automated tool. This tool can import PST data files into Office 365, Exchange Server, Gmail, and other Outlook accounts and offers a range of advanced options.
    • Use the Backup Outlook and Export Outlook to PST utilities to regularly back up your data and maintain an organized mailbox. These utilities copy or move messages, contacts, appointments, meetings, tasks, notes, journal entries, and other Outlook items from specific folders to an Outlook data file (PST). This is also helpful in backing up your data before attempting any major changes or repairs.
  7. Reduce the data file or Outlook storage size.
    You can leverage Outlook's built-in archiving feature to transfer older emails to a separate PST file. The fastest way to reduce the data file size is to compact it with the ReliefJet Outlook Tweaker tool. It automatically compresses PST and OST files when you exit Outlook.
    Outlook Tweaker
    Another option is to use specialized utilities designed to decrease the size of your PST file and prevent the occurrence of the 0x800CCC0D Outlook error. The following add-ins are available to effortlessly address the problem of an oversized PST file:
    • Split PST file. This utility splits Outlook PST files into smaller ones based on your specified criteria. By splitting the PST files, you minimize the chances of file corruption and error messages. The advanced version of this tool offers the flexibility to arrange your mail and other items according to your preferences.
    • Remove Attachments. This tool eliminates unnecessary attachments from your messages. By doing so, it effectively reduces the size of your data file and helps prevent issues related to an oversized PST file.
    • Replace Attachments with Links. This utility can save attachments to a specified folder and replace them with links in your Outlook items, which can help reduce the size of your PST/OST files. You can automatically restore attachments from links at any moment.
    • Export mailbox data to PST format. By exporting Outlook to PST with a specialized tool you can archive redundant data and free up space in your mailbox. Flexible settings and filters allow you to export exactly the items you no longer need, while saving the ones you do.
  8. Check antivirus or firewall.
    • Temporarily disable your antivirus software and firewall to determine if they are causing the error.
    • Restart Outlook and check if the error persists. If the error is resolved, adjust the settings of your antivirus or firewall to prevent future conflicts.
  9. Reconfigure the email account.
    • Open Outlook, click on File > Account Settings > Account Settings.
    • Select the problematic email account and click Remove.
    • After removing the account, add it again by clicking New and following the on-screen instructions to configure the account correctly.
  10. Create a new Outlook profile.
    • Go to File > Account Settings > Manage profiles.
    • Click Show Profiles > Add and enter a new profile name.
    • Follow the on-screen instructions to configure the new profile, and then set it as the default profile.
    • Restart Outlook, enter the profile that you created, and see if the error is resolved.
  11. Disable conflicting add-ins or plugins.
    • Open Outlook, click on File > Options > Add-ins.
    • At the bottom, click on the Manage drop-down menu and select COM Add-ins > Go.
    • Uncheck any suspicious or conflicting add-ins and click OK.
    • Restart Outlook to see if the error is resolved.
    Manage COM add-ins in Outlook
  12. Repair the MS Office installation.
    • Close all Microsoft Office applications.
    • Press Windows+R keys, type "control appwiz.cpl" in the Run dialog box, and press OK.
    • Locate "Microsoft Office" in the list of installed programs, select it, and click Change.
    • Choose Quick Repair in the Office setup window, then click Repair and follow the on-screen instructions to complete the repair process.
  13. Contact your email service provider.
    If none of the above steps resolve the error, contact your email service provider to check for any server-side issues or configuration changes that might be causing the error.

Remember to back up your Outlook data before attempting any major changes or repairs to avoid potential data loss.


Outlook error 0x8004010d often arises when the mailbox or data file is too big, or when disk space is too low. The error 0x8004010d should not be neglected, as it can eventually cause disruptions in the functioning of Outlook. By applying the methods and add-ins mentioned in this article, you can efficiently address the underlying causes of this error. The automated tools not only save time and effort but also provide additional benefits and are flexible and customizable. Such a professional and user-friendly approach helps to resolve the 0x8004010d error quickly and easily, thus ensuring a smooth and error-free experience with Microsoft Outlook.

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