</STYLE>

    </head>

    <BODY>
        <h1>
            Get changes from AAD.
        </h1>  
            <?php 
$deltaLink = NULL;
if (!empty($_GET)) {
    $deltaLink = $_GET["deltaLink"];
}
$moreChangesAvailable = FALSE;
do {
    $response = GraphServiceAccessHelper::getDeltaLinkFeed($deltaLink, "directoryObjects");
    $changes = $response->{'value'};
    if (!empty($changes)) {
        foreach ($changes as $change) {
            PrintObjectHelper::PrintObject($change);
        }
    } else {
        echo 'No changes available at this time.<br>';
    }
    $deltaLink = $response->{'aad.nextLink'};
    if (empty($deltaLink) || $deltaLink == NULL) {
        $deltaLink = $response->{'aad.deltaLink'};
        $moreChangesAvailable = FALSE;
    } else {
        // more changes are available.
        $moreChangesAvailable = TRUE;