In addition to HamNRye's answer, there are a few Perl tools that will help.

Win32::Daemon will allow you to set your script up as a Windows Service. It is more powerful than srvany.exe because it gives you access to the service control manager inside your service so you can see if the service is paused, etc and execute bits of code when the service is paused\started\resumed - useful for clean service operation. Also with srvany.exe - if you pause your service, it pauses srvany.exe and not your script - it just keeps running.

If you want to run a command as a specific user, you can use Win32::AdminMisc's LogonAsUser() and CreateProcessAsUser() functions.

I'm not very familiar with Exchange, so I am not sure if this answers your question.

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