Question : IIS runtime error in /OMA application, reregistering ASP.NET fails

Windows Server 2003 SP1 with Exchange Server 2003 SP1 and Microsoft.NET Framework v1.1.4322

When browsing to http://mail.servername.local/exchange, the following error is generated.

Server Error in '/OMA' Application.
--------------------------------------------------------------------------------

Runtime Error

Microsoft KB 818486 discusses this issue, and documents reinstallation of ASP.NET to fix security information.  When running the procedure for reinstalling ASP.NET, the problem is not resolved, and the ASPNETSetup.Log file contains an entry:

2005-05-25 11:35:29      Failure       Getting IIS6 specific SID: GetPrincipalSIDfailed with HRESULT8000ffff: 'Catastrophic failure  '

Any suggestions leading to resolution would be greatly appreciated.  
Thanks,
Mike

Answer : IIS runtime error in /OMA application, reregistering ASP.NET fails

Try the following command first:

c:\WINNT\Microsoft.NET\Framework\v1.1.4322\aspnet_regiis.exe -i

If this works check http://support.microsoft.com/default.aspx?scid=KB;EN-US;818486 for reasons why.
If it doesn't work start with the following:

Check Permissions of the c:\windows\microsoft.net\framework\v1.1.4322
 - Network services should have (read and execute, list folder content, Read)
 - System should have (ALL)
 - Users should have  (read and execute, list folder content, Read)

Check Permissions of the c:\windows\microsoft.net\framework\v1.1.4322\Temporary asp.net Files
 - The configuration should be the same as c:\windows\microsoft.net\framework\v1.1.4322

Dave Dietz