Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool reads the following registry entry to determine the version of Microsoft Windows® running on the Exchange Server computer:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\CurrentVersion

A CurrentVersion value of 4.0 indicates that the Exchange Server computer is running on Microsoft Windows NT® Server 4.0. A value of 5.0 indicates that the Exchange Server computer is running Windows 2000 Server and a value of 5.2 indicates the Exchange Server computer is running Windows Server™ 2003.

The Exchange Server Analyzer also queries the Win32_ComputerSystem Microsoft Windows Management Instrumentation (WMI) class to determine the value set for the NumberOfProcessors key. This value represents the number of processors installed on the computer. These processors include both physical processors and logical processors. A physical processor can be split into two logical processors by using hyper-threading technology from Intel.

The Exchange Server Analyzer also reads the following registry entry to determine whether the Exchange Server is a bridgehead for an X.400 connector:

HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeMTA

Finally, the Exchange Server Analyzer queries the CIM_Datafile Windows Management Instrumentation (WMI) class to determine the value of the Version key for a file named Afd.sys.

The Exchange Server Analyzer displays a warning if the following conditions are true:

This warning indicates that the version of Afd.sys installed on the server may cause mail flow issues with X.400 connectors homed on this server.

To resolve this problem, obtain the update referenced in Microsoft Knowledge Base article 904712, "Mail delivery is slower than expected, or mail delivery stops, on an X.400 connector to a remote site in Exchange Server 5.5" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=904712).