In Microsoft Exchange Server 2007, you can set the FilterWebBeaconsAndHtmlForms parameter of the Microsoft Office Outlook Web Access virtual directory to allow Web beacons and HTML forms. In this situation, you can set the FilterWebBeaconsAndHtmlForms parameter to DisableFilter or to UserFilterChoice. However, Web beacons and HTML forms in e-mail attachments are blocked regardless of the parameter setting. This behavior may interfere with third-party solutions that rely on Web beacons and on HTML forms in e-mail message attachments.

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To resolve this problem in Exchange Server 2007 Service Pack 1, install Update Rollup 1 for Exchange Server 2007 Service Pack 1. For more information, click the following article number to view the article in the Microsoft Knowledge Base: To resolve this problem in the release version of Exchange Server 2007, install Update Rollup 6 for Exchange Server 2007.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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

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For more information about the FilterWebBeaconsAndHtmlForms parameter, visit the following Microsoft Web sites:

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