Why doesn't this script also process the subfolders when it should? - powershell

Question

I want to move all folders as well as subfolders and files in the subfolders from dir 1 to dir 2 in SharePoint Online via PowerShell. The script already moves all files from the main directory of dir 1 (/sites/customer/shared documents/dir 1) to the main directory of dir 2 (/sites/customer/shared documents/dir 2). But somehow it doesn't move files from subfolders like "/sites/customer/shared documents/dir 1/sub 1".
#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
Function Move-SPOFilesBetweenFolders
{
param
(
[Parameter(Mandatory=$true)] [string] $SiteURL,
[Parameter(Mandatory=$true)] [Microsoft.SharePoint.Client.Folder] $SourceFolder,
[Parameter(Mandatory=$true)] [Microsoft.SharePoint.Client.Folder] $TargetFolder
)
Try {
#Write-host "Copying Files from '$($SourceFolder.ServerRelativeUrl)' to '$($TargetFolder.ServerRelativeUrl)'"
#Get all Files from the source folder
$SourceFilesColl = $SourceFolder.Files
$Ctx.Load($SourceFilesColl)
$Ctx.ExecuteQuery()
#Iterate through each file and move
Foreach($SourceFile in $SourceFilesColl)
{
#Get all files from source Folder
$SourceFile =$Ctx.Web.GetFileByServerRelativeUrl($SourceFile.ServerRelativeUrl)
$Ctx.Load($SourceFile)
$Ctx.ExecuteQuery()
$TargetFileUrl = $SourceFile.ServerRelativeUrl -Replace $SourceFolderURL,$TargetFolderURL
Try {
#Move File to destination
$SourceFile.MoveTo($TargetFileUrl, [Microsoft.SharePoint.Client.MoveOperations]::None)
$Ctx.ExecuteQuery()
Write-host -f Green "File Moved to: "$TargetFileURL
}
catch {
Write-host -f Red "File already exists: "$TargetFileURL
}
}
#Process Sub Folders
$SubFolders = $SourceFolder.Folders
$Ctx.Load($SubFolders)
$Ctx.ExecuteQuery()
Foreach($SubFolder in $SubFolders)
{
If($SubFolder.Name -ne "Forms")
{
#Prepare Target Folder
$EnsureFolderURL = $SubFolder.ServerRelativeUrl -Replace $SourceFolderUrl, $TargetFolderUrl
Try {
$Folder=$Ctx.web.GetFolderByServerRelativeUrl($EnsureFolderURL)
$Ctx.load($Folder)
$Ctx.ExecuteQuery()
}
catch {
#Create Folder
if(!$Folder.Exists)
{
$Folder=$Ctx.Web.Folders.Add($EnsureFolderURL)
$Ctx.Load($Folder)
$Ctx.ExecuteQuery()
Write-host "New Folder Created:"$SubFolder.Name -f Yellow
}
}
#Call the function recursively to move all files from source folder to target
Move-SPOFilesBetweenFolders -SiteURL $SiteURL -SourceFolder $SubFolder -TargetFolder $Folder
#Remove the Source Folder
$SubFolder.Recycle() | Out-Null
$Ctx.ExecuteQuery()
}
}
}
Catch {
write-host -f Red "Error Moving File:" $_.Exception.Message
}
}
#Set Parameter values
$SiteURL="https://company.sharepoint.com/sites/customer"
$SourceFolderURL ="/sites/customer/shared documents/dir 1"
$TargetFolderURL ="/sites/customer/shared documents/dir 2"
#Setup Credentials to connect
$Cred= Get-Credential
#Setup the context
$Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
$Ctx.Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)
#Get the source and Target Folders
$SourceFolder=$Ctx.Web.GetFolderByServerRelativeUrl($SourceFolderURL)
$Ctx.Load($SourceFolder)
$TargetFolder=$Ctx.Web.GetFolderByServerRelativeUrl($TargetFolderURL)
$Ctx.Load($TargetFolder)
$Ctx.ExecuteQuery()
#Call the function
Move-SPOFilesBetweenFolders -SiteURL $SiteURL -SourceFolder $SourceFolder -TargetFolder $TargetFolder
Only files from the main directory /sites/customer/shared documents/dir 1 have been moved to /sites/customer/shared documents/dir 2. The script should also include subfolders and their files.