If you are running the IntelliTrace stand alone collector to collect the trace against an Application Pool which is running under the identity “.\<username>” then you are likely to run into the following exception,
Start-IntelliTraceCollection : Some or all identity references could not be translated.
At line:1 char:29
+ Start-IntelliTraceCollection <<<< "FabrikamFiber.Web" C:\IntelliTraceCTP\collection_plan.ASP.NET.trace.xml C:\Intell
iTraceLogs
+ CategoryInfo : NotSpecified: (:) [Start-IntelliTraceCollection], IdentityNotMappedException
+ FullyQualifiedErrorId : System.Security.Principal.IdentityNotMappedException,Microsoft.VisualStudio.IntelliTrace
.PowerShell.StartIntelliTraceCollectionCommand
Steps to reproduce the issue
The application pool “FabrikamFiber.Web” is using the identity “.\Admin”


Workaround
Change the identity of the application pool to <MachineName|Domain>\<UserName>. So, in the above work around if I change the identity to “Production\Admin” then the IntelliTrace does not throw an exception.


This error has been reported to Microsoft and it is expected that it will be fixed in one of the future releases.
Enjoy! 