Microsoft KB Archive/919884

= A downloaded .xfd file is empty when you use Outlook Web Access to access a mailbox on a computer that is running Exchange Server 2003 Service Pack 2 =

Article ID: 919884

Article Last Modified on 10/30/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Service Pack 2

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SYMPTOMS
You use Microsoft Outlook Web Access to access a mailbox on a computer that is running Microsoft Exchange Server 2003 Service Pack 2. When you download an .xfd file attachment, and you try to open the file, the downloaded file is empty.



CAUSE
This problem occurs because Exchange Server 2003 does not recognize the file type.



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 2 (SP2) installed to apply this hotfix.

Restart requirement
When you apply this hotfix, the IIS Admin Service, the Microsoft Search service, the Microsoft Exchange Information Store service, and any dependent services are automatically restarted.

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

File information
The global 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 item 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 you access a file by using Outlook Web Access, Exchange Server 2003 verifies the file name extension. 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. Files that have .xfd extensions are secured forms data that is stored in XML format.

After this hotfix is installed, you can configure a list of additional file name extensions that are enabled through the following registry value:

Location:

Value: AttachExtensionAllowed

Type: STRING

Note Use the following format for additional file name extensions:. The following are examples of the format:
 * .xfd
 * .myext1
 * .myext2

