An Exchange Server 2003 virus-scanning program does not obtain sender information from an e-mail message that the program receives from an Exchange Server 5.5 user (910188)

SYMPTOMS

You use a virus-scanning program that accesses the Microsoft Exchange Server 2003 virus-scanning API (VSAPI 2.0 or VSAPI 2.5) to scan e-mail messages in your organization. The virus-scanning program does not obtain sender information from e-mail messages if the following conditions are true:

You have a mixed-mode organization that consists of Exchange Server 2003 servers and Microsoft Exchange Server 5.5 servers.
The virus-scanning program processes messages that the program receives from an Exchange Server 5.5 server that is in the same administrative group.

In this situation, all the following properties are missing from the received message or messages:

PR_SENDER_NAME
PR_SENDER_ADDRTYPPE
PR_SENDER_EMAIL_ADDRESS

CAUSE

This problem occurs because the Exchange Server 2003 VSAPI expects the sender properties to exist on the e-mail message envelope. This expectation is valid for an SMTP-based e-mail message transfer between servers. However, this expectation is not valid for an X400-based e-mail message transfer between servers.

By default, the connection between Exchange Server 5.5 and Exchange Server 2003 uses the X400 protocol. Therefore, the Exchange Server 2003 VSAPI does not successfully obtain the sender information when the VSAPI scans e-mail messages from users who are hosted on servers that use X400 connectors to connect to Exchange Server 2003. This situation includes the implicit X400 connector that Exchange Server 5.5 uses to communicate with Exchange Server 2003.

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 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

You must have Exchange Server 2003 Service Pack 2 (SP2) installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after 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
Store.exe	6.5.7650.16	5,248,000	22-Dec-2005	04:21	x86

MORE INFORMATION

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates