Manage NAV Application Server instances service state

Start-Stop-Restart-NAV-NST-instances.ps1

function StartStopNSTs($action)
{

    Import-Module "${env:ProgramFiles(x86)}\Microsoft Dynamics NAV\100\RoleTailored Client\Microsoft.Dynamics.Nav.Model.Tools.psd1" -WarningAction SilentlyContinue | out-null
    Import-Module "$env:ProgramFiles\Microsoft Dynamics NAV\100\Service\NavAdminTool.ps1" -WarningAction SilentlyContinue | Out-Null
    Import-Module "${env:ProgramFiles(x86)}\Microsoft Dynamics NAV\100\RoleTailored Client\Microsoft.Dynamics.Nav.Apps.Tools.psd1" -WarningAction SilentlyContinue | Out-Null

    $NSTs = Get-NAVServerInstance | Where-Object -Property 'State' -eq 'Running'

     if(!$NSTs) {
        Write-Output "No NSTs found"

     } 
     else 
     {
        $NSTsCnt = Get-NAVServerInstance | Where-Object -Property 'State' -eq 'Running' | Measure-Object
        Write-Output "NSTs found in: $($NSTsCnt.Count)"
        if($action -eq "running")
        { 
            Write-Output $NSTs
            return 
        }
		
		Foreach ($NST in $NSTs) 
        {
		    if($action -eq "start")
            {
                $NST | Set-NAVServerInstance -Start
                Write-Host "Starting $($NST.DisplayName)"
            }
            elseif($action -eq "stop")
            {
                $NST | Set-NAVServerInstance -Stop
                Write-Host "Stopping $($NST.DisplayName)"
            }
            elseif($action -eq "restart")
            {
                $NST | Set-NAVServerInstance -Restart
                Write-Host "Restarting $($NST.DisplayName)"
            }
            else
            {
                write-host "Unknown action"
            }
		}
    }

}

## Make sure you don't run this in production carelessly 

StartStopNSTs "running" #this is harmless :)

## Other flavors below...
# StartStopNSTs "start"
# StartStopNSTs "stop"
# StartStopNSTs "restart"