Microsoft KB Archive/254976

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XCON: MIME Internet X.400 Enhanced Relay Does Not Map SMTP Subdomains to Organizational Units

Article ID: 254976

Article Last Modified on 10/26/2006


  • Microsoft Exchange Server 5.5 Service Pack 3

This article was previously published under Q254976


If you have configured the Exchange Server message transfer agent (MTA) to map between SMTP addresses and X.400 addresses according to the following Microsoft Knowledge Base article:

238507 XCON: Exchange Server Message Transfer Agent MIXER Mapping Tables

the subdomains of the SMTP address may not be mapped to organizational unit (OU) attributes in the X.400 O/R address.

For example, the following entry in the file maps "" to "C=FR;A=ADMD;P=PRMD":$PRMD.admd$ADMD.c$FR#

A message that is addressed to should then be converted to an X.400 message that is addressed to C=FR;A=ADMD;P=PRMD;O=area;OU1=dept, but the actual mapping is to C=FR;A=ADMD;P=PRMD;O=area. No OUs are mapped.


This issue can occur because the Exchange Server MTA contains a logic error that causes the generated OU values to be overwritten.


To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack


Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5 Service Pack 3. This problem was first corrected in Exchange Server 5.5 Service Pack 4.

Additional query words: MIXER OU ORGUNIT

Keywords: kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbqfe KB254976