param (
    [string]$UserName = $( Read-Host "Input UserName, please" ),
    [string]$Password = $( Read-Host "Input password, please" ),
    [string]$SiteUri = $( Read-Host "Input SiteUri, please" ),
    [string]$FromUser = $( Read-Host "Input FromUser, please" ),
    [string]$ToUser = $( Read-Host "Input ToUser, please" )
)
$host.Runspace.ThreadOptions = "ReuseThread"

#Definition of the function that gets all the SharePoint groups and Users per Group in a SharePoint site
function Clone-SPOUserGroupPermissions
{
    param ($sSiteColUrl,$Credential,$fromUser,$toUser)
    try
    {

        #SPO Client Object Model Context
        $spCtx = New-Object Microsoft.SharePoint.Client.ClientContext($sSiteColUrl)

        $spCtx.Credentials = $Credential

        #Root Web Site
        $spRootWebSite = $spCtx.Web
        #Collecction of Sites under the Root Web Site
        $spSites = $spRootWebSite.Webs

        #Loading Operations
        $spGroups=$spCtx.Web.SiteGroups
        $spCtx.Load($spGroups)
        $spCtx.ExecuteQuery()

        #We need to iterate through the $spGroups Object in order to get individual Group information
        foreach($spGroup in $spGroups){
            $spCtx.Load($spGroup)

            $spCtx.ExecuteQuery()

            #Getting the users per group in the SPO Site
            $spSiteUsers=$spGroup.Users
            $spCtx.Load($spSiteUsers)
            $spCtx.ExecuteQuery()

            foreach($spUser in $spSiteUsers){
				if ($spUser.Email -eq $fromUser)
				{
					Write-Host $spGroup.Title "," $spUser.Email
					Add-SPUsersToGroup -sSiteColUrl $sSiteColUrl -Credential $Credential -sGroup $spGroup.Title -sUserToAdd $toUser
				}
            }
        }

        $spCtx.Dispose()
    }
    catch [System.Exception]
    {
        write-host -f red $_.Exception.ToString()
    }
}


function Add-SPUsersToGroup
{
    param ($sSiteColUrl,$Credential,$sGroup,$sUserToAdd)
    try
    {

        Write-Host "Adding User $sUserToAdd to group $sGroup in $sSiteColUrl" -foregroundcolor Green
        #SPO Client Object Model Context
        $spCtx = New-Object Microsoft.SharePoint.Client.ClientContext($sSiteColUrl)

        $spCtx.Credentials = $Credential

        #Getting the SharePoint Groups for the site
        $spGroups=$spCtx.Web.SiteGroups
        $spCtx.Load($spGroups)
        #Getting the specific SharePoint Group where we want to add the user
        $spGroup=$spGroups.GetByName($sGroup);
        $spCtx.Load($spGroup)
        #Ensuring the user we want to add exists
		#Write-Host  " Buscando -> " $sUserToAdd
        $spUser = $spCtx.Web.EnsureUser($sUserToAdd)
        $spCtx.Load($spUser)
        $spUserToAdd=$spGroup.Users.AddUser($spUser)
        $spCtx.Load($spUserToAdd)
        $spCtx.ExecuteQuery()

        Write-Host "SharePoint User $sUserToAdd added succesfully!!" -foregroundcolor Green
        $spCtx.Dispose()
    }
    catch [System.Exception]
    {
        write-host -f red $_.Exception.ToString()
    }
}


$SecurePassword = $Password | ConvertTo-SecureString -AsPlainText -Force
$SPOCredentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName, $SecurePassword)
Clone-SPOUserGroupPermissions -sSiteColUrl $SiteUri -Credential $SPOCredentials -fromUser $FromUser -toUser $ToUser