[Reflection.Assembly]::LoadFrom("$scriptdirMicrosoft.SharePoint.Client.dll")
$context = New-Object Microsoft.SharePoint.Client.ClientContext($siteURL)
$context.RequestTimeOut = 1000 * 60 * 10;
$context.AuthenticationMode = [Microsoft.SharePoint.Client.ClientAuthenticationMode]::Default
$securePassword = ConvertTo-SecureString $password -AsPlainText -Force
$credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username, $securePassword)
$context.Credentials = $credentials
$web = $context.Web
$site = $context.Site
$context.Load($web)
$context.Load($site)
$context.ExecuteQuery()
Set-Variable -Name "clientContext" -Value $context -Scope Global
Set-Variable -Name "rootSiteUrl" -Value $siteURL -Scope Global
Function Get-CQList {
    $listName = "Tasks"
    $list = $clientContext.Web.Lists.GetByTitle($listName)
    $cq = new-object Microsoft.Sharepoint.Client.ChangeQuery($true,$true)
    $col = new-object Microsoft.Sharepoint.Client.ChangeCollection  #returns "Constructor not found. Cannot find an appropriate constructor for type Microsoft.Sharepoint.Client.ChangeCollection"
    $col = $list.GetChanges($cq)
    $clientContext.ExecuteQuery()
    $col.AreItemsAvailable  #returns false
    foreach ($item in $col) {
        # get data here from specific column name/row
    }
}