How to Fix Error Code 0x80040600 in Outlook 2021/2019/365

This Article describes the Office Outlook Error code 0x80040600. It is not working properly with an error While some performing actions like Sending or Receiving emails or configure emails etc. This maybe looks like An Unknown Error has Occurred, 0x80040600. In this case, you have to repair the Outlook PST file using the Microsoft’s Outlook Inbox Repair Tool (Scanpst.exe).

Disclaimers: Fixing an error on Office program deals with your documents, emails, spreadsheets, and presentations. Please backup your data before you proceed. If you are not sure about the procedure, contact the technician for the support.

Applicable to the following versions of Outlook solution:

  • Outlook 2021, 2019, 365
  • Microsoft Office 365/2019/2021

Causes of Office Outlook Error 0x80040600:

  • Internet Connectivity Issue
  • Temp files location is infected with active malware
  • Power corruption
  • Disk damage and other unknown reasons

Symptoms of Outlook Error 0x80040600:

  • program lock-ups
  • slow PC performance
  • system freezes
  • startup and shutdown problems
  • installation errors and hardware failure.

How to Resolve the Office  Outlook Error code 0x80040600:

  1. Check proxy settings.
  2. Check corrupt system files.
  3. Enable the Hidden files & folders view.
  4. Run the Inbox Repair tool-Scanpst.exe

1. Check Proxy Settings:

  • Click the start button at the corner of the system and then search the control panel.
  • Once the control panel is opened and then click the Network & Internet option.
  • After that go to the Internet Options then open the Internet property Window.
  • Then click on connections tab then right at the bottom click on LAN settings make sure automatically detect settings is checked on the automatic configurations option.
  • Most LAN configurations these days don’t need proxy server settings.

2. Check Corrupt System Files:

  • Press Windows Key + R. Run Dialogue Box will open up.
  • Enter CMD and Press OK.
  • In a command prompt copy the following commands and enter the each command
    SFC Scan
  • The SFC /scan now command will scan all protected system files, and replace corrupted files with a cached copy that is located in a compressed folder at %WinDir%\System32\dllcache.
  • The %WinDir% placeholder represents the Windows operating system folder. For example, C:\Windows.
  • After the process is finished, you may receive one of the following messages:
  1. Windows Resource Protection did not find any integrity violations.
  2. Windows Resource Protection could not perform the requested operation.
  3. Next Windows Resource Protection found corrupt files and successfully repaired them. Details are included in the CBS.Log %WinDir%\Logs\CBS\CBS.log.
  4. Windows Resource Protection found corrupt files but was unable to fix some of them. Details are included in the CBS.Log %WinDir%\Logs\CBS\CBS.log.

3. Enable the Hidden Files & Folders view:

  • Open the Windows Control Panel and then Open Folder Options after that Click the View tab.
  • Then Check to enable the Show hidden files, folders, and drives option then Click OK button.

4. Run the Inbox Repair tool-SCANPST.EXE

  • First Close Outlook then Open Windows Explorer and locate the scanpst.exe repair tool at this location:C:\Program Files\Microsoft Office\%OfficeVersion%\SCANPST.EXE
  • Double-click to open SCANPST.EXE and Click the Browse.
  • Locate the corrupted Outlook data file (e.g. Outlook.pst) at this location.


Note: In Outlook 2013, the Outlook Data file is stored by default at:

C:\Users\%Username%\Documents\Outlook Files\Outlook.pst

  • Press the Scan button and be patient until the Inbox Repair Tool repairs the corrupted file.

Note: At final repair phase you will be asked if you want to create a backup. Answer “Yes” to continue the repair operation.

  • Run the tool, and browse to the following location to choose the Outlook data file which you want to repair.


  •  Click Start, which will start the repair process.

Note: The repair might take a long time depending on the size of Data file.

  • 7. After the scanning is complete you will be prompted to click repair.

Note: -You will need to uncheck cache mode.

*If repair process will not work in your case, then recreate OST

Other Repair options,

If you would like to have a support taken through a technical assistance. Feel free to initiate a chat or write us on with the complete information of the computer make and model. Office or windows operating system versions and the best time to reach you for support.
We provide support for Microsoft products like Windows and Office and Outlook. We can also setup free tools provided and included with Microsoft Windows and can train you on how to use them to maintain the health of your computer. You can also ask for System Repair Image support or some Recovery help. We also restore your computer to a point when it was working fine without any issues.
Feel free to chat with us for any support. A free assistance can be provided for all the basic troubleshooting without any additional resources.
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