Automatically finds, runs and places Outlook into the system tray.

OutlookAutostartAndMinimise.ps1

<#
.Synopsis

Automatically finds, runs and places Outlook into the system tray.

.Description

Automatically finds, runs and places Outlook into the system tray.
By default, Outlook will start full-screen even when you have the option to minimize tray enabled and start the app as minimized.

This requires that the OUTLOOK.EXE tray icon is enabled and that the minimize to tray option is on.

Author: NotoriousPyro (Craig Crawford)

#>

$autostartOutlook = $true

$outlook = Invoke-Command -ScriptBlock {
    $versions = Get-ChildItem "HKLM:\SOFTWARE\Microsoft\Office" | Where-Object { $_.Name -like '*.*' } | Sort-Object -Property Name -Descending

    $outlookexe = $versions.ForEach({
        $path = 'Registry::' + $_.Name
        try
        {
            $versionPath = Get-ItemProperty -LiteralPath (Join-Path $path 'Outlook\InstallRoot') -Name Path -ErrorAction SilentlyContinue
            $installRoot = ($versionPath).Path
        }
        catch {}

        if ($installRoot -ne $null)
        {
            $outlookexe = Join-Path $installRoot 'OUTLOOK.EXE'

            if (Test-Path -Path $outlookexe)
            {
                return $outlookexe
            }
        }
    })
    return $outlookexe
}

$User32Definition = @'
    [DllImport("user32.dll")] public static extern bool CloseWindow(IntPtr hWnd);
    [DllImport("user32.dll")] public static extern bool IsWindowVisible(IntPtr hWnd);
'@

# add signature as new type to PowerShell (for this session)
$User32 = Add-Type -MemberDefinition $User32Definition -Name User32 -PassThru

$maxLoops = 10; $loops = 0

do
{
    $outlookHandle = Get-Process OUTLOOK -ErrorAction SilentlyContinue

    if (-not $outlookHandle -and $autostartOutlook)
    {
        Write-Verbose "Starting OUTLOOK.EXE from $outlook"
        Start-Process $outlook
        Start-Sleep -Seconds 2
    }

    if ($outlookHandle)
    {
        $windowHandle = $outlookHandle.MainWindowHandle

        Write-Verbose "OUTLOOK.EXE is running..."

        if ($User32::IsWindowVisible($windowHandle))
        {
            Write-Verbose "OUTLOOK.EXE is visible... attempting to minimize..."

            $minimized = $User32::CloseWindow($windowHandle)

            Start-Sleep -Seconds 2

            if (-not $minimized)
            {
                Write-Verbose "Failed to minimize OUTLOOK.EXE... Outlook may still be starting..."
                $outlookHandle = $null
            }
            elseif (-not $User32::IsWindowVisible($windowHandle))
            {
                Write-Verbose "OUTLOOK.EXE is now minimized"
                break;
            }
        }
        else
        {
            Write-Verbose "OUTLOOK.EXE not visible..."
            break;
        }
    }
    
    Write-Verbose "Waiting for OUTLOOK.EXE to be ready, attempt: $loops of $maxLoops"

    Start-Sleep -Seconds 2

    $loops += 1
}
until ($null -ne $outlookHandle -or $loops -ge $maxLoops)

well I have hardcoded the OUTLOOK.EXE path in Line#19
it working fine
thank you again for this neat script 👍