How do you rename an attachment using workflow designer GetFileBvServerRelativeURL MoveTo

Opened a case with Microsoft TrackingID#2408270040008802.

Resolution:

·   There is not a simple way using the built-in cmdlets to rename an existing file attachment

·  I suggested you would need to download the bytes for the attachment, delete the original attachment, then add a new one with the new name.

You were able to get it to work using the SpListItem.Attachments.Add and SpListItem.Attachments.Delete methods in SharePoint Management Shell by writing a PowerShell script.

Here are a few snippets of the code:

$webURL = "
$listName = "{ListName}" 
#Get the SPWeb object and save to variable
$listWeb = Get-SPWeb $webURL
#Get the SPList object to retrieve the list
$list = $listWeb.Lists[$listName]
$listItems = $list.Items
$intRenamedCounter = 0
$intRenamedErrorCounter = 0

foreach ($listItem in $listItems)
{
  [string]$theAttachmentFlag = $listItem["Attachments"]
  if ($theAttachmentFlag.Equals("True"))
  {
     $intRenamedForThisItem = 0
 
    $AttachmentsColl = @($listItem.Attachments)  #This was needed to prevent an error on the foreach attachment loop because the attachments were being changing by this script.
     Foreach ($attachment in $AttachmentsColl)   
     {
          Try
          {  
			$file = $listWeb.getfile($listitem.attachments.UrlPrefix + $attachment)  
			$newfile = $listWeb.GetFile($listItem.Attachments.UrlPrefix + $strNewAttachmentName)
			$bytes = $file.OpenBinary() 
			$listItem.Attachments.Add($strNewAttachmentName,$bytes) 
			$listItem.Attachments.Delete($attachment) 
            $intRenamedCounter = $intRenamedCounter + 1
			$intRenamedForThisItem = $intRenamedForThisItem + 1
 
    } #End of Try
           Catch
           {
              Write-All "   ERROR. A problem occurred renaming the attachment above. Check the hazard attachments for duplicate names. Contact IT for assistance, if needed."
              Write-Warning "Caught an exception:"
              Write-Warning "Exception Message: $($_.Exception.Message) - Attachment:$($attachment) NewName: $($strNewAttachmentName) "
              $intRenamedErrorCounter = $intRenamedErrorCounter + 1
           }
 
     }# End of ForEach Attachment
     
     if ($intRenamedForThisItem -gt 0)
        {
        Retry{
            $listItem.Update()  #Attachments aren't changed without this 
             }
			Catch
			 {
               	Write-All "   ERROR. A problem occurred updating the list item above. Contact IT for assistance, if needed."              
				Write-Warning "Caught an exception:"              Write-Warning "Exception Message: $($_.Exception.Message) - List Item:$($strIssueNo) "
              $intRenamedErrorCounter = $intRenamedErrorCounter + $intRenamedForThisItem
			  $intRenamedCount = $intRenamedCounter - $intRenamedForThisItem
	        } 

        }
 
 } # End of Attachment = True (Item has an attachment)
 
} #end of Item Loop