Outlook Error Code 0x80040115: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
0x80040115
Brand
Outlook
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Outlook error code 0x80040115 indicates that your email client cannot connect to the Exchange server, usually due to profile corruption or network issues. This error prevents you from sending or receiving emails and typically appears when starting Outlook or syncing mailbox data.
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Tools You'll Need

How to Fix Error Code 0x80040115

  1. Restart Outlook and Check Network Connection

  2. Run Outlook in Safe Mode

  3. Repair Your Outlook Profile

    Back up your Outlook data file (.pst) before making profile changes

  4. Create a New Outlook Profile

    Write down your email settings before creating a new profile

  5. Update Outlook and Windows

  6. Check Antivirus and Firewall Settings

    Only disable antivirus temporarily and re-enable it immediately after testing

  7. Repair Office Installation

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When to Call a Professional

Contact your IT administrator or Microsoft Support if the error persists after trying all steps, especially in corporate environments where Exchange server settings may need adjustment. Also seek professional help if you're uncomfortable making registry changes or if this is a managed corporate account.

Frequently Asked Questions

What causes Outlook error 0x80040115?
Error 0x80040115 is typically caused by corrupted Outlook profiles, network connectivity issues, outdated Office versions, conflicting add-ins, or Exchange server configuration problems.
Will I lose my emails when fixing this error?
No, your emails stored on the Exchange server remain safe. However, any locally stored emails in PST files should be backed up before making profile changes as a precaution.
How do I prevent Outlook error 0x80040115 from happening again?
Keep Outlook updated, regularly restart the application, avoid force-closing Outlook, maintain stable internet connection, and run Windows updates regularly. Also disable unnecessary add-ins.
Can this error affect other Office applications?
This specific error only affects Outlook's connection to Exchange server. Other Office applications like Word or Excel are not impacted by this particular error code.
Is error 0x80040115 the same in different Outlook versions?
Yes, error code 0x80040115 has the same meaning across different Outlook versions (2016, 2019, 2021, 365), though the interface for fixing it may vary slightly between versions.

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