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invoking IIsApplicationPool.EnumAppsInPool may result in 'Unknown name' exception

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So if you are using ADSI to invoke EnumAppsInPool to get all the applications assigned to a given application pool. It might result in a “Unknown name. (Exception from HRESULT: 0x80020006 (DISP_E_UNKNOWNNAME))” error.

So what I have found is that if you are calling the invoke from a Windows XP machine it will cause this error.  But if you making the call from a Windows Server 2003 (or Longhorn Server) machine it will work.  I am looking into if this is a bug or by design. 

The IIS6 management on XP (https://www.microsoft.com/downloads/details.aspx?FamilyID=F9C1FB79-C903-4842-9F6C-9DB93643FDB7&displaylang=en) download does NOT fix this issue.