Microsoft KB Archive/256844

= XCON: Routing and Remote Access Service Connection Does Not Work with 9301 Warning on Receiving Server =

Article ID: 256844

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Service Pack 1
 * Microsoft Exchange Server 5.5 Service Pack 2
 * Microsoft Exchange Server 5.5 Service Pack 3

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This article was previously published under Q256844



SYMPTOMS
When an Exchange Server computer attempts to initiate a Routing and Remote Access Service (RAS) connection to another Exchange Server computer, the receiving server may refuse the connection and log the following 9301 warning

The message transfer gateway that uses the network address %2 and the transport stack %1 could not be found. Check the configuration of the mail gateway.

where %2 is the hexadecimal representation of an Internet Protocol (IP) address that is pulled from the IP RAS pool on the receiving server.



CAUSE
This problem can occur because when you use a modem to send a message, the modem queries the receiving server to receive an IP address. When you use Routing and RAS over X.400, this query causes problems. X.400 compares the IP address of the message to the IP address that is displayed in the Stack tab of the connector, which is the IP address of the originating server. Because the two IP addresses do not match, the connector refuses the connection attempt and generates the 9301 warning.



RESOLUTION
Exchange Server 5.5 Service Pack 1 and later versions of Exchange Server allow you to define an IP address to use for outbound X.400 connections over Routing and RAS. To implement this feature, perform the following steps on the originating Routing and RAS Exchange Server computer:  Identify the Relative Distinguished Name (RDN) of the X.400 Connector by using the Microsoft Exchange Server Administrator program in raw mode. You need this name to implement the necessary registry modifications on the server:WARNING: If you use the raw mode of the Exchange Server Administrator program (admin /r) incorrectly, serious problems may occur that may require you to reinstall Microsoft Windows NT Server, Microsoft Exchange Server, or both. Microsoft cannot guarantee that problems that result from using raw mode incorrectly can be solved. Use raw mode at your own risk.

 Start the Exchange Server Administrator program in raw mode by typing the following at a command prompt:

c:\exchsrvr\bin\admin /r

 Double-click Site, double-click Configuration, double-click Connectors, and then select the X.400 Connector object in the right pane. On the File menu, click Raw Properties to open the raw properties of the X.400 Connector. In the Object Attribute column, click Obj-Dist-Name, and in the Attribute Value box, scroll to the right until you locate the last "cn=" value. This is the RDN that you use to create the registry key name. For example, if the X.400 Connector object is named "TCP to MTA B," the value for the Obj-Dist-Name object attribute is displayed similar to the following:

/o=Organization/ou=Site/cn=Configuration/cn=Connection/cn=TCP to MTA B

In this example, the RDN value is "TCP to MTA B." Select this value, and copy the value. </li> Use the RDN value ("TCP to MTA B" in this example) that you copied from the Exchange Server Administrator program in raw mode to create a registry key:WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

 Start Registry Editor (Regedt32.exe).</li> Locate the following key in the registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeMTA\Parameters

</li> On the Edit menu, click Add Key, and then add a registry key. In the Key Name box, paste the RDN value that you copied from the Exchange Server Administrator program in raw mode, and leave the Class box blank. In this example, the Key Name is "TCP to MTA B."</li> Select the new registry key. On the Edit menu, click Add Value, and then add the following registry value:

Value Name: Stack IP Address Override

Data Type: REG_SZ

Value: The IP address of the originating server, in standard dot notation (for example, 123.123.123.123)

This IP address is now used as the From IP address when you create a connection to the recipient server.</li> Quit Registry Editor.</li></ol> </li> Stop and then restart the Exchange Server message transfer agent (MTA) service so that the changes take effect.</li></ol>

Note that these changes are only required for X.400 Connectors that create outbound Routing and RAS connections. This change does not affect incoming messages.

For additional information and troubleshooting on occurrences of 9301 warnings, click the article numbers below to view the articles in the Microsoft Knowledge Base:

197378 XCON: MTA generates 9301 Events on Incoming Connections

189345 XCON: MTA Logs Event 9301 Though X.400 Connector is identified

193380 XCON: Mail Does Not Flow over X.400 Connector; Event 9301 Logged

169113 XCON: Using an X.400 Connector with TCP/IP in a Cluster Environment

234962 XCON: Certain Builds of the MTA Do Not Generate 9301 Event ID

Additional query words: XMRP

Keywords: kbprb KB256844

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