Ask the Expert

Logging Event ID 6009 after migration to Exchange 2003

I upgraded my Exchange 2000 server to Exchange 2003. Everything seemed fine -- users could send and receive e-mail. But in the application log, under Event Viewer, I saw the following error:

Source: MSExchangeTransport
Event ID: 6009
Description: Categorizer encountered a hard error while processing a message. While processing user "X500:CN=Alex Tan, CN=Users,DC=NCHEE,DC=com" the function "CCatDLRecip::HrProcessItem_Default" called "HrAddNewAddressesFromICatItemAttr" which returned error code "0xc004055a" (). ( f:tisp1transmtsrcphatqcatsrcccatrecip.cpp ).

Can you tell me what it means?

I noticed the users do not have any Exchange mailboxes. Is this the reason I got this error in my Event Viewer?

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Did you look in the Message Awaiting Directory Lookup SMTP queue? Also, did you try to search for that X500 address on the objects in the directory? It might be a message in the queue that cannot be delivered. I'm just not 100% sure if that error is because of the upgrade to Exchange 2003, or just something you noticed with increased logging and attention to the system post-upgrade.


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Related information from SearchExchange.com:

  • Exchange Server diagnostics: An introduction to application and system logs
  • Tip: Troubleshooting Exchange Server error messages
  • Tip: Event log errors between Exchange 5.5. and Exchange 2000/2003
  • Tip: Resource for troubleshooting Exchange Event IDs
  • Reference Center: Monitoring and logging tips and resources
  • Reference Center: Migration advice

  • This was first published in March 2006

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