Microsoft KB Archive/266260

= XADM: Rules That Use an SMTP Address Do Not Run After You Install Anti-Virus Software =

Article ID: 266260

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Service Pack 3

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This article was previously published under Q266260



SYMPTOMS
When you specify the Simple Mail Transfer Protocol (SMTP) address in the To box of a message, rules may not run after you install anti-virus software that uses the virus application programming interface (API).

The To box no longer displays the SMTP address of the recipient but it resolves to the display name of the mailbox. In the open message, if you right-click the recipient in the To box, and then click Properties, you receive the properties for the Exchange Server mailbox; if the header does not resolve to the display name, you receive the SMTP properties.



CAUSE
The following registry key is enabled when you install an API virus solution: 

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIMC\Parameters\ReRouteViaStore

When this registry key is enabled, all messages must pass through the information store and resolve the P2 header to the display name in the folder. When the P2 header is resolved, the rule is no longer triggered.



WORKAROUND
Contact the anti-virus software vendor for information about how to disable this registry key and for information about the effect of disabling this registry key.

You can create or modify rules to run when the rules are addressed to the Exchange Server mailbox display name instead of an SMTP address.



MORE INFORMATION
For additional information about this problem, click the article number below to view the article in the Microsoft Knowledge Base:

238471 XIMS: How to Force SMTP Messages Through the Information Store

Keywords: kbprb KB266260

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