Ok this may be just an incorrect understanding of what this plugin does but apparently the jobs are still being run as the normal service account user.

I am using AD for authentication and I am logged in as myself. If I trigger the build (set to Run as User Triggering the Build) I can see in the log that it says "Running as Leandro" but then if I execute a batch file and run a "whoami" command I still get the default windows service user.

{{Started by user Leandro
Running as Leandro
[EnvInject] - Loading node environment variables.
Building in workspace C:\Jenkins\workspace\TestUser
[TestUser] $ cmd /c call C:\Users\HICCIU~1\AppData\Local\Temp\hudson2968857796480795156.bat

C:\Jenkins\workspace\TestUser>whoami
centre\hicciuser
}}

Am I expecting something that the plugin is not meant to do? What is the plugin meant for then?