Event ID 4011 is logged when you query free/busy data for external contacts in Exchange Server 2007

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Article ID: 972514 - View products that this article applies to.
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When you query free/busy data for external contacts in Microsoft Exchange Server 2007, the following event is logged consistently in the Application log:
Event Type: Error
Event Source: MSExchange Availability
Event Category: Availability Service 
Event ID: 4011
Process <ID>[w3wp.exe:/LM/W3SVC/1/ROOT/EWS-<ID>]: Configuration for forest <external domain name> was not found in Active Directory. Run the Add-AvailabilityAddressSpace command in the Exchange Management Shell for an Exchange Server 2003 Active Directory forest.

Note: This Event 4011 may cause confusing to the Exchange administrators because it is a normal situation that the Free/Busy data of external contacts is not available


This issue occurs because of a logic error in Exchange Server 2007. Specifically, Exchange Server 2007 tries to locate free/busy data for external contacts. When the free/busy data is unavailable, Exchange Server 2007 still logs an event. However, you do not expect Exchange Server 2007 to log an event when free/busy data for external contacts is unavailable.


To resolve this issue, apply the following update:
971534 Description of Update Rollup 1 for Exchange Server 2007 Service Pack 2


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Article ID: 972514 - Last Review: November 19, 2009 - Revision: 1.1
  • Microsoft Exchange Server 2007 Service Pack 2, when used with:
    • Microsoft Exchange Server 2007 Standard Edition
    • Microsoft Exchange Server 2007 Enterprise Edition
kbsurveynew kbqfe kbexpertiseinter KB972514

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