Using PowerShell Remoting with Workflows and Functions

Question

Hello,
I have an existing set of scripts with a mixture of Modules containing the functions, Workflows that call the functions and Main script that invokes the workflows.
Step 1: The Main script picks up the list of servers from a custom db and invokes the relevant workflow for further operation
Step 2: The workflow runs as foreach parallel and calls a function by passing the server name as a parameter
Step 3. The function in the module does the real job
All of this runs, from a central location. 90% of the server are geo dispersed. This seems to be a bit of a concern in terms of turnaround time is too high. 
Hence, I would like to use WinRM (PowerShell Remoting). I have configured WinRM on all the Server with Firewall Exception.
My Queries:
1. Apart from using Enter-PSSession or Invoke-Command, are there any other CMDLet's?
2. Say for example; I plan to use Enter-PSSession, should I embed the code with Workflow?
3. How will it retrieve the output?
Please advice, Thanks
Rajiv

Answer 1

You cannot use Enter-PSSession in a script.  
It's only intended to be used interactively from the console. If you try to use it in a script, the script will run the subsequent commands on the local system, not in the remote session.
You'll need to use Invoke-Command, and you'll have to include the function definitions in the invoked script block, since those functions will not exist in the remote sessions.
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