In your Exchange 2016 environment you might come across the following event ID constantly logged in the application log, EventID 1023,Perflib:

  • “Windows cannot load the extensible counter DLL MSExchangeIS. The first four bytes (DWORD) of the Data section contains the Windows error code.”


As we are running in Coexistence in this lab, you need to navigate to the setup files or the Exchange directory and copy a few files to your Exchange 2016 Server:

  • “\setup\serverroles\common\perf\amd64” OR
  • “\Program Files\Microsoft\Exchange\V14\Bin\perf\AMD64”

Now locate the following files:

  • md*
  • perfnm.h

Copy all these files above to the following location on your Exchange 2016 Server:

  • “\Program Files\Microsoft\Exchange\V15\Bin\perf\AMD64”

If you load PerfMon now and open MSExchangeIS you should be able to view the counters.

Hope it helps.

By edward