Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool reads the following registry entry to determine whether Simple Mail Transfer Protocol (SMTP) connector routing logic has been modified from its default setting:


If the Exchange Server Analyzer finds that the AttachedTimeout registry key is present and configured with a value greater than 300, a non-default configuration message is displayed.

The AttachedTimeout registry entry is a custom configuration setting for Exchange Server that determines the frequency at which the ORG_INFO packet is sent. Every time the routing client does not connect to a routing server, the user version of the topology will be incremented and will cause the ORG_INFO packet to be broadcast throughout the whole organization.

This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore the registry if a problem occurs. For information about how to restore the registry, view the "Restore the Registry" Help topic in Regedit.exe or Regedt32.exe.

To revert to the default configuration

  1. Open a registry editor, such as Regedit.exe or Regedt32.exe.

  2. Navigate to: HKLM\System\CurrentControlSet\Services\RESvc\Parameters

  3. Delete the AttachedTimeout registry key.

  4. Close the registry editor.

  5. Restart the IIS Admin Service for the change to take effect.

Before you edit the registry, and for information about how to edit the registry, see Microsoft Knowledge Base article 256986, "Description of the Microsoft Windows Registry" (

For more information about the AttachedTimeout registry value, see Knowledge Base article 832281, "Link state issues and routing issues in Exchange 2000 Server and in Exchange Server 2003" (