This is a guide on how to repair the Outlook error code: 0x80040600

The following error alert appears in Outlook when you try to send, receive, read or delete emails:

"An unknown error has occurred. 0x80040600"

Error 0x80040600 occurs if your .pst file is corrupt and Outlook is unable to access it.

To fix this, you will need to run the PST repair tool to scan and repair the corrupt file.

If your .pst file is larger than 2 GB, Outlook's internal repair tool will not work and you will have to use the tool above.

Alternative error messages:

"Microsoft Exchange Server reported error (0x80040600) : 'Unknown Error 0x80040600'"

"Messaging interface has caused an unknown error"

Applies:

• Microsoft Office Outlook 2007
• Microsoft Office Outlook 2003
• Microsoft Outlook 2002 Standard Edition
• Windows XP or Windows Vista

Microsoft Exchange offline address book

Error Codes:

kbceip kbnomt kbexpertiseinter kbexpertisebeginner kbtshoot kbreceivemail kbsendmail kberrmsg kbprb KB814441 0x80040600