How to enable additional Exchange information store logging

You may need to enable additional Microsoft Windows NT Performance Monitor information store logging for troubleshooting purposes.

To enable additional Performance Monitor information store logging, you need to modify the registry. To have us fix this problem for you on Exchange Server 2000, Exchange Server 2003 or Exchange Server 2007, go to the "Fix it for me" section. If you prefer to fix this problem yourself or are using Exchange Server 5.5, go to the "Let me fix it myself" section.

Fix it for me

To fix this problem automatically on Exchange Server 2000, Exchange Server 2003 or Exchange Server 2007, click the Fix this problem link. Then, click Run in the File Download dialog box and follow the steps in this wizard.
Fix this problem
Microsoft Fix it 50330
Note this Fix it solution works for all languages. However, for some languages, the wizard text may be in English

Note if you are not on the computer that has the problem, save the Fix it solution to a flash drive or a CD and then run it on the computer that has the problem.

After you run the Fix it solution, you must restart Performance Monitor to see the new counters. The new counters are located under the MSExchangeIS object.

Let me fix it myself

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To enable additional Performance Monitor information store logging yourself or on Exchange Server 5.5 do the following:

1. Start Registry Editor (Regedt32.exe).
2. Locate the Library value under the following key in the registry:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\Performance
3. On the Edit menu, click String.
   
   For Microsoft Exchange Server 5.5:
   Change the value from c:\exchsrvr\bin\mdbperf.dll to c:\exchsrvr\bin\mdbperfX.dll, and then click OK.
   
   For Microsoft Exchange Server 2000 and Microsoft Exchange Server 2003:
   Change the value from c:\Program Files\exchsrvr\bin\mdbperf.dll to c:\Program Files\exchsrvr\bin\mdbperfX.dll, and then click OK.
   
   For Microsoft Exchange Server 2007:
   Change the value from c:\Program Files\Microsoft\Exchange Server\bin\perf\%PROCESSOR_ARCHITECTURE%\mdbperf.dll to c:\Program Files\Microsoft\Exchange Server\bin\perf\%PROCESSOR_ARCHITECTURE%\mdbperfx.dll, and then click OK.
4. Quit Registry Editor.

After you modify this registry value, you must restart Performance Monitor to see the new counters. The new counters are located under the MSExchangeIS object.