Required Bootstrapping of WinRM before its of any value for PowerShell Remoting

bootstrap_server.ps1

param($computername=$(throw "-computername is required"), $username=$(throw "-username is required"), $password=$(throw "-password is required"))
<#
  .SYNOPSIS
  
  Bootstraps a server for use with WinRM.
  
  Requires running under a username which is an adminstrator on remote machine.
  Requires PSEXEC from sysinternals
  
  
  .PARAMETER $computername
  
  The name of the remote computer we are bootstrapping.  This should take the form of '\\wddcsdmon01'.
  
  .PARAMETER $username
  
  The domain\account we are using to authenticate against the remote server.
  
  .PARAMETER $password
  
  $username password.  This is *clear* text for now.
 
  
  .DESCRIPTION
  
  
  Bootstraps a server for use with WinRM.
  
  Requires running under a username which is an adminstrator on remote machine.
  Requires PSEXEC from sysinternals
  
   
    
  .EXAMPLE
  
  .\bootstrap_server -computername 
  
#>


import-module .\remote.ps1

function invoke($description, [scriptblock]$scriptblock)
{

  write-host "$computername invoking $description"
  
  $output = invoke-remoteexpression -computer $computername -expression $scriptblock -noprofile -username $username -password $password | out-string
  
  write-debug $output
  
  write-host "$computername $description COMPLETE"
  
}

$psexec_command = get-command psexec -erroraction silentlycontinue

if ( $psexec_command -eq $null )
{
  write-error "PSExec not found in path.  Please make sure PSExec is in your PATH environment variable."
  return
}

write-host "bootstrapping $computername for WinRM"
write-host "PSExec found at $($psexec_command.definition)"


invoke "set-executionpolicy Unrestricted -force" { set-executionpolicy Unrestricted -force } 

invoke "winrm quickconfig -quiet" { winrm quickconfig -quiet } 

invoke "enable-wsmancredssp -role server -force" { enable-wsmancredssp -role server -force }

invoke "winrm set winrm/config/client '@{TrustedHosts=""*""}'" { winrm set winrm/config/client '@{TrustedHosts="*"}' }

write-host "$computername WinRM bootstrap COMPLETE"
write-host ""
write-host "example of testing WinRM remoting:"
write-host ""
write-host 'c:\>$cred = get-credential'
write-host 'c:\>invoke-command -computername wddcsdwmsa293.mkappsdev.com -scriptblock { dir c:\temp } -credential $cred -authentication credssp'