"Task 'Microsoft Exchange Server' reported error (0x8004011B) : 'Unknown error 0x8004011B"

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Article ID: 555049 - View products that this article applies to.
Author: Yuval Sinay MVP
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SYMPTOMS

The error message:  "Task 'Microsoft Exchange Server' reported error (0x8004011B) : 'Unknown error 0x8004011B" can apper when outlook do send/receive operation.
 

CAUSE

There few circumstances that can lead to this problem:
 
1.  Antivirus software block connection from Outlook to the Exchange server.
2.  Firewall block connection from Outlook to the Exchange server.
3.  Outlook 2003 has been installed on Exchange 2003 Server/domain controller.
4.  Outlook profile has been Corrupted.
5.  Exchange database has been corrupted  (usually this occur if some third party software - like antivirus - scan Exchange database directly).

RESOLUTION

1. Disable any antivirus on the client side and server side.
2. Verity that you use antivirus software that compatible to Exchange 2003 and Outlook 2003.
3. If the outlook and Exchange server insulated from each other by using firewall, there may need to configure static port mapping:
     http://support.microsoft.com/default.aspx?scid=kb;en-us;q270836
4. Check Exchange database by using Eseutil Utility and Isinteg Utility.
5. Delete old outlook profile and create a new profile.
6. If Outlook 2003 has been installed on Exchange server/domain controller, there need to change the security settings of "log on network security" to "Kerberos
     Password Authentication"  ("Kerberos/NTLM Password Authentication" - the default settings - may fail to use correct authentication model).

MORE INFORMATION

XADM: How to Defragment with the Eseutil Utility (Eseutil.exe)
 
http://support.microsoft.com/default.aspx?scid=kb;en-us;q192185 
 
XADM: Description of the Isinteg Utility
 
http://support.microsoft.com/default.aspx?scid=kb;EN-US;182081
 
Using Exchange Server 2003 Recovery Storage Groups
 
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/exchange/Exchange2003/proddocs/library/ue2k3rsg.asp
 
Exchange 2000 and Exchange 2003 Static Port Mappings
 
http://support.microsoft.com/default.aspx?scid=kb;en-us;q270836

Properties

Article ID: 555049 - Last Review: January 25, 2004 - Revision: 1.0
APPLIES TO
  • Microsoft Exchange Server 2003 Enterprise Edition
Keywords: 
kbpubtypecca kbpubmvp kbhowto KB555049
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