How to Fix Outlook Error 0x800408fc

This essay offers solutions to fix Outlook error 0x800408fc, provides recommendations on software, and explains relevant technical terms. Additionally, FAQs and helpful tips are included.

Nene Aly

By Nene Aly / Updated on March 4, 2024

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Outlook error 0x800408fc is a common issue that can disrupt your email communication. This error code indicates a problem with the synchronization between your Microsoft Outlook application and the mail server. Fortunately, there are several solutions available to resolve this error and restore the smooth functioning of Outlook.

The Problem: Outlook Error 0x800408fc

Outlook error 0x800408fc often occurs when attempting to send or receive emails. This error can prevent you from accessing your inbox, sending important messages, or receiving crucial information. Understanding the problem is crucial to finding an effective solution.

Possible causes of Outlook error 0x800408fc:

  1. Invalid or outdated email server settings
  2. Corrupted Outlook data files
  3. Firewall or antivirus software blocking Outlook

Solution 1: Verify Email Server Settings

  1. Open Microsoft Outlook and go to the 'File' menu.
  2. Select 'Account Settings' and click on your email account.
  3. Verify the incoming and outgoing mail server settings.
  4. Make necessary corrections if the settings are invalid or outdated.
  5. Save the changes and restart Outlook to check if the error is resolved.

Solution 2: Repair Outlook Data Files

  1. Close Microsoft Outlook if it's running.
  2. Open the 'Control Panel' on your computer.
  3. Search for 'Mail' or 'Mail (32-bit)' and open it.
  4. In the 'Mail Setup' window, click on 'Data Files'.
  5. Select your Outlook data file and click on 'Open File Location'.
  6. Locate the data file and make a backup copy.
  7. Run the 'Scanpst.exe' utility to repair the data file.
  8. Follow the on-screen instructions to complete the repair process.
  9. Once the repair is done, open Outlook and check if the error is resolved.

Solution 3: Check Firewall and Antivirus Settings

  1. Open your firewall or antivirus software settings.
  2. Ensure that Microsoft Outlook is included in the list of allowed applications.
  3. If Outlook is blocked, make necessary changes to the settings.
  4. Restart Outlook and verify if the error is resolved.

Software Recommendation: Stellar Outlook Repair

One recommended software for fixing Outlook errors, including error 0x800408fc, is Stellar Outlook Repair. This software is known for its effectiveness in repairing corrupt Outlook data files, resolving synchronization issues, and restoring email functionality.


  • Powerful and efficient repair capabilities
  • User-friendly interface
  • Compatible with various Outlook versions


  • Paid software with a trial version
  • May require technical knowledge for advanced repair options

How to use Stellar Outlook Repair:

  1. Download and install Stellar Outlook Repair from the official website.
  2. Launch the software and select the corrupt Outlook data file.
  3. Click on 'Repair' to initiate the repair process.
  4. Once the repair is completed, open Outlook and check if the error is resolved.

Frequently Asked Questions (FAQs)

Q: What should I do if the error persists after trying the solutions?

A: If the error persists, you may need to contact your email service provider for further assistance. They can provide specific guidance based on your email server settings.

Q: Can I use the solutions provided for other Outlook errors?

A: While the solutions mentioned in this essay can resolve various Outlook errors, it's important to note that specific error codes may require different troubleshooting steps. It's recommended to search for solutions tailored to the particular error code you are experiencing.

Q: Are there any preventive measures to avoid Outlook errors?

A: Yes, maintaining up-to-date software, regularly backing up your Outlook data files, and ensuring proper email server settings can help prevent Outlook errors from occurring.

Q: Can I recover my emails if they are lost due to this error?

A: If you have a recent backup of your Outlook data file, you can restore your emails after resolving the error. If no backup is available, it may be challenging to recover lost emails.

Q: How do I update my email server settings?

A: To update email server settings, you'll need to access the account settings in Microsoft Outlook. From there, you can modify the incoming and outgoing server details as provided by your email service provider.

Q: Is it necessary to restart my computer after applying the solutions?

A: While it's not always necessary to restart your computer, it can help ensure that all changes made during the troubleshooting process are properly applied. Restarting your computer can refresh system resources and potentially resolve any issues.

Technical Terms

Email synchronization: The process of ensuring that the emails on your device and the mail server are updated and reflect the same information.

Data files: Files that store Outlook-specific data, including emails, contacts, and calendar events, on your computer.

Firewall: A security system that monitors and controls incoming and outgoing network traffic, including programs like Microsoft Outlook.


  • Regularly update your Outlook application to benefit from bug fixes and improvements.
  • Consider using an email backup software to protect your valuable email data.
  • If you encounter recurring Outlook errors, seek professional assistance for thorough diagnosis and resolution.


In conclusion, Outlook error 0x800408fc can be frustrating, but with the provided solutions and recommendations, you can effectively resolve the issue. Remember to carefully follow the steps outlined in each solution and consider using Stellar Outlook Repair for advanced repair options. Stay vigilant with preventive measures and seek expert help if needed to ensure continued smooth functioning of your Outlook application.

Nene Aly
Nene Aly · Editor