A downloaded .xfd file is empty when Outlook Web Access users try to download .xfd file attachments in Exchange Server 2003 (903146)

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

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

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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.

File name	File version	File size	Date	Time	Platform
Mdbmsg.dll	6.5.7233.49	3,270,144	17-Sep-2005	01:51	x86
Redir.asp	Not applicable	3,304	04-Jun-2005	01:56	Not applicable
Store.exe	6.5.7233.49	5,182,976	17-Sep-2005	02:26	x86

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: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\InternetContent
Value: AttachExtensionAllowed
Type: STRING

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