Microsoft KB Archive/903146

= A downloaded .xfd file is empty when Outlook Web Access users try to download .xfd file attachments in Exchange Server 2003 =

Article ID: 903146

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition

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SYMPTOMS
When Outlook Web Access users try to download .xfd file attachments in Microsoft Exchange Server 2003, the downloaded file is empty. Files that have .xfd extensions are secured forms data that is stored in an XML format.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
Because of file dependencies, you must have Microsoft Exchange Server 2003 Service Pack 1 (SP1) installed to apply this hotfix.

Restart requirement
The Microsoft Exchange Information Store service and any dependent services are automatically restarted when you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
When users access a file though Outlook Web Access, the file name extension is verified. If the extension is a known HTML or XML extension, the content is sent to the client. However, if the extension is an XML file that has an unknown file name extension such as .xfd, the content is not sent to the client. After this hotfix is installed, you can configure a list of additional file name extensions that are allowed through the following registry value:

Location:

Value: AttachExtensionAllowed

Type: STRING

Note The format for additional file name extensions is as follows:. This is a placeholder for the extension including the period (&quot;.&quot;) that comes before the extension. The following are examples of the format: .xfd;.myext1;.myext2

