Event ID 1 is logged on the Exchange Server 2010 Client Access server in a mixed Exchange Server 2010 and Exchange Server 2003 environment

Article ID: 2733415 - View products that this article applies to.

Symptoms

Consider the following scenario:

You have a mixed Microsoft Exchange Server 2010 and Exchange Server 2003 environment.
The Exchange Server 2010 server has Update Rollup 3 for Exchange Server 2010 Service Pack 2 (SP2) installed.
An Exchange Server 2003 user creates a new Microsoft Outlook profile or runs the Test E-mail AutoConfiguration tool in Microsoft Office Outlook 2007 or Microsoft Outlook 2010.

Note To run the Test E-mail AutoConfiguration tool, hold down the Ctrl key, right-click the Outlook icon in the notification area on the right side of the taskbar, and then click Test E-mail AutoConfiguration.

In this scenario, the following event is logged in the Application log on the Exchange Server 2010 Client Access server:

Source: MSExchange Autodiscover
Event ID: 1
Task Category: Web
Level: Error
Description: Unhandled Exception "User setting 'PreferredSite' is not available."

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This issue occurs because the Exchange Server 2010 Client Access server does not calculate the PreferredSite value appropriately for the Autodiscover service request from the Exchange Server 2003 user.

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Resolution

To resolve this issue, install the following update rollup:

2785908

(http://support.microsoft.com/kb/2785908/ )

Description of Update Rollup 5 version 2 for Exchange Server 2010 Service Pack 2

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Status

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

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More information

For more information about Update Rollup 3 for Exchange Server 2010 SP2, click the following article number to view the article in the Microsoft Knowledge Base:

2685289

(http://support.microsoft.com/kb/2685289/ )

Description of Update Rollup 3 for Exchange Server 2010 Service Pack 2

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Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use

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for other considerations.

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