<#<Param (
           [parameter(Mandatory=$true)][string]$UserName, 
           [parameter(Mandatory=$true)][string]$Password, 
           [parameter(Mandatory=$true)][string]$SiteUrl, 
           [parameter(Mandatory=$true)][string]$SiteName,
           [parameter(Mandatory=$true)][string]$SPFolder,
           [parameter(Mandatory=$true)][string]$FolderPath
           )#>

$UserName ="XXXX" 
$Password ="XXXX"
$SiteUrl = "https://XXXXXX.sharepoint.com"
$SiteName ="teams/XXXXX"
$FolderPath ="D:\Public\test\test\300"
$SPFolder ="Shared Documents/FolderName/FolderName1"
 
#Function to import Folders and files to sharepoint folder
Function UploadFolderContents([string]$FolderImportPath,[Microsoft.SharePoint.Client.Folder]$SPFolder,[string]$FolderURL)
{
Write-Host "Input -> FolderImportPath is: $FolderImportPath"
Write-Host "Input -> FolderURL is:" $FolderURL

    # Iterate the Folder files and upload to sharePoint
    Foreach($File in (dir $FolderImportPath -File))  
    {  
        
        $Url_File = $SiteUrl + $FolderURL +"/"+ $File.Name
        Write-Host "Adding File : $Url_File"
        $FileStream = New-Object IO.FileStream($File.FullName, [System.IO.FileMode]::Open)  
        $FileCreationInfo = New-Object Microsoft.SharePoint.Client.FileCreationInformation  
        $FileCreationInfo.Overwrite = $true  
        $FileCreationInfo.ContentStream = $FileStream  
        $FileCreationInfo.URL = $Url_File
        $Files = $SPFolder.Files.Add($FileCreationInfo)  
        $Context.Load($Files)  
        $Context.ExecuteQuery() 
    }

    # Iterate the Folders and upload the folder
    Foreach($Directory in (dir $FolderImportPath -Directory))
    {  
        $DirName = $Directory.Name
        #$DirName = $Directory.Name -replace '%','%25'
        $FolderCURL = $FolderURL +"/"+ $DirName

        Write-Host "Adding Folder : $FolderCURL" 

        #sharepoint online powershell create folder
        $Folder = $SPFolder.Folders.Add($DirName)
        $Context.Load($Folder) 
        $SPFolder.Context.ExecuteQuery()

        $Folder_URL = $FolderURL +"/"+ $Folder.Name

        $SubFolder = $FolderImportPath +"\"+ $Directory.Name
 
        #Function to import Folders and files to sharepoint folder by Recursively
        UploadFolderContents -FolderImportPath $SubFolder -SPFolder $Folder -FolderURL $Folder_URL
        
    }
    
}

# Add references to SharePoint client assemblies and authenticate to Office 365 site - required  for CSOM  

$ClientDll= $PSScriptRoot +"\Microsoft.SharePoint.Client.dll"
$RuntimeDll=$PSScriptRoot +"\Microsoft.SharePoint.Client.Runtime.dll"
[Net.ServicePointManager]::SecurityProtocol = 'TLS11','TLS12','ssl3'

Add-Type -Path $ClientDll
Add-Type -Path $RuntimeDll

#Setup Credentials to connect
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName,(ConvertTo-SecureString $Password -AsPlainText -Force))
 
    Try 
    {
        #Set up the context
        $Context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl +"/"+ $SiteName)
        $Context.Credentials = $credentials
        $Context.RequestTimeout=10000*5000

        $Url_Folder = "/"+ $SiteName +"/"+ $SPFolder
        Write-Host $Url_Folder

        #Get the List Root Folder
        $FolderImport=$Context.web.GetFolderByServerRelativeUrl($Url_Folder)
      
        UploadFolderContents -FolderImportPath $FolderPath -SPFolder $FolderImport -FolderURL $Url_Folder
       
        Write-host "Folder and Files Updated Successfully!" -ForegroundColor Green
    }
    catch {
        write-host "Error: $($_.Exception.Message)" -foregroundcolor Red
    }