Madhu-Anbalagan

$everythingUnderMediaLibrary = Get-Item master: -Query "/sitecore/media library//*"
$outputFilePath = "C:\Media_Library_Export.csv" #Create an empty csv file and paste the path here
$results = @();
  
$everythingUnderMediaLibrary | ForEach-Object {
  
  $properties = @{
        ItemID = $_.ID
        Name  = "$($_.Name)"
        ItemPath = "$($_.ItemPath)"

Madhu-Anbalagan

$path = "master:/sitecore/content/external_forms"
$templateName = "EmailTemplate"
$emailAddresses = "test@test.com"
$fieldName = "ToEmail"

$items = Get-ChildItem -Path $path -Recurse | Where-Object { $_.TemplateName -eq $templateName }

foreach($item in $items) {
	if($item.Fields[$fieldName] -ne 'null'){
		$item.Editing.BeginEdit()