diff --git a/main/admin/add_users_to_usergroup.php b/main/admin/add_users_to_usergroup.php
index 99171ee4e2..03e6b727ff 100755
--- a/main/admin/add_users_to_usergroup.php
+++ b/main/admin/add_users_to_usergroup.php
@@ -112,6 +112,44 @@ function change_select(reset) {
     });
 }
 
+</script>';
+$htmlHeadXtra[] = '
+<script>
+$(document).ready(function() {
+    function showLastTenUsers() {
+        var selectedUsers = [];
+        $("#elements_in option").each(function() {
+            selectedUsers.push($(this).val());
+        });
+
+        var groupId = "'.$id.'";
+        $.ajax({
+            type: "POST",
+            url: "'.api_get_self().'",
+            data: {
+                action: "get_last_ten_users",
+                excludedUsers: selectedUsers,
+                id: groupId
+            },
+            dataType: "json",
+            success: function(data) {
+                var select = document.getElementById("elements_not_in");
+                select.innerHTML = "";
+
+                $.each(data, function(index, user) {
+                    select.append(new Option(user.username + " - " + user.firstname + " " + user.lastname, user.id));
+                });
+            },
+            error: function(xhr, status, error) {
+                console.error("Error en la solicitud AJAX: " + status + " - " + error);
+            }
+        });
+    }
+
+    $("#show_last_ten_users_button").click(function() {
+        showLastTenUsers();
+    });
+});
 </script>';
 
 $form_sent = 0;
@@ -133,6 +171,35 @@ if (empty($id)) {
     api_not_allowed(true);
 }
 
+if (ChamiloApi::isAjaxRequest() && $_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action']) && $_POST['action'] === 'get_last_ten_users') {
+    $excludedUsers = isset($_POST['excludedUsers']) ? $_POST['excludedUsers'] : [];
+    $id = isset($_POST['id']) ? intval($_POST['id']) : 0;
+
+    $excludedIds = !empty($excludedUsers) ? implode(",", array_map('intval', $excludedUsers)) : '0';
+    $sql = 'SELECT id, username, firstname, lastname
+            FROM user
+            WHERE status != '.ANONYMOUS.'
+            AND id NOT IN ('.$excludedIds.')
+            ORDER BY id DESC
+            LIMIT 10';
+
+    $result = Database::query($sql);
+    $users = [];
+
+    while ($user = Database::fetch_array($result)) {
+        $users[] = [
+            'id' => $user['id'],
+            'username' => $user['username'],
+            'firstname' => $user['firstname'],
+            'lastname' => $user['lastname']
+        ];
+    }
+
+    header('Content-Type: application/json');
+    echo json_encode($users);
+    die();
+}
+
 $first_letter_user = '';
 
 if ((isset($_POST['form_sent']) && $_POST['form_sent']) || isset($_REQUEST['firstLetterUser'])) {
@@ -453,13 +520,18 @@ echo '</div>';
                                placeholder="<?php echo get_lang('Search'); ?>"
                                onkeydown="return 13 !== event.keyCode;">
                         <span class="input-group-btn">
-                    <button class="btn btn-default" type="button" onclick="change_select();">
-                        <?php echo get_lang('Filter'); ?>
-                    </button>
-                    <button class="btn btn-default" type="button" onclick="change_select(true);">
-                        <?php echo get_lang('Reset'); ?>
-                    </button>
-                </span>
+                            <button class="btn btn-default" type="button" onclick="change_select();">
+                                <?php echo get_lang('Filter'); ?>
+                            </button>
+                            <button class="btn btn-default" type="button" onclick="change_select(true);">
+                                <?php echo get_lang('Reset'); ?>
+                            </button>
+                        </span>
+                        <span class="input-group-btn">
+                            <button class="btn btn-default" type="button" id="show_last_ten_users_button" title="<?php echo get_lang('ShowLastTenUsers') ?>">
+                                <i class="fa fa-clock-o"></i>
+                            </button>
+                        </span>
                     </div>
                 </div>
                 <?php
diff --git a/main/session/add_users_to_session.php b/main/session/add_users_to_session.php
index 394404da59..569fcfbd05 100644
--- a/main/session/add_users_to_session.php
+++ b/main/session/add_users_to_session.php
@@ -5,6 +5,8 @@
  * @package chamilo.admin
  */
 // resetting the course id
+use Chamilo\CoreBundle\Component\Utils\ChamiloApi;
+
 $cidReset = true;
 
 require_once __DIR__.'/../inc/global.inc.php';
@@ -14,8 +16,8 @@ $xajax->registerFunction('search_users');
 // setting the section (for the tabs)
 $this_section = SECTION_PLATFORM_ADMIN;
 
-$id_session = isset($_GET['id_session']) ? (int) $_GET['id_session'] : 0;
-$addProcess = isset($_GET['add']) && 'true' === $_GET['add'] ? 'true' : null;
+$id_session = isset($_REQUEST['id_session']) ? (int) $_REQUEST['id_session'] : 0;
+$addProcess = isset($_REQUEST['add']) && 'true' === $_REQUEST['add'] ? 'true' : null;
 
 SessionManager::protectSession($id_session);
 
@@ -65,6 +67,40 @@ if (is_array($extra_field_list)) {
     }
 }
 
+if (ChamiloApi::isAjaxRequest() && isset($_POST['action'])) {
+    $id_session = isset($_POST['id_session']) ? (int) $_POST['id_session'] : 0;
+    $excludedUsers = isset($_POST['excludedUsers']) ? $_POST['excludedUsers'] : [];
+
+    $excludedUsersList = count($excludedUsers) > 0 ? implode(",", array_map('intval', $excludedUsers)) : '0';
+
+    if ($_POST['action'] == 'get_last_ten_users') {
+        $sql = "SELECT u.id, u.username, u.firstname, u.lastname
+                FROM $tbl_user u
+                LEFT JOIN $tbl_session_rel_user sru ON (u.id = sru.user_id AND sru.session_id = $id_session)
+                WHERE sru.user_id IS NULL
+                AND u.id NOT IN ($excludedUsersList)
+                ORDER BY u.id DESC
+                LIMIT 10";
+    } elseif ($_POST['action'] == 'get_all_users') {
+        $sql = "SELECT u.id, u.username, u.firstname, u.lastname
+                FROM $tbl_user u
+                LEFT JOIN $tbl_session_rel_user sru ON (u.id = sru.user_id AND sru.session_id = $id_session)
+                WHERE sru.user_id IS NULL
+                AND u.id NOT IN ($excludedUsersList)
+                ORDER BY u.lastname ASC, u.firstname ASC";
+    }
+
+    $result = Database::query($sql);
+    $users = [];
+    while ($row = Database::fetch_assoc($result)) {
+        $users[] = $row;
+    }
+
+    header('Content-Type: application/json');
+    echo json_encode($users);
+    die();
+}
+
 function search_users($needle, $type)
 {
     global $id_session;
@@ -304,6 +340,77 @@ function change_select(val) {
     xajax_search_users(val,"multiple");
 }
 </script>';
+$htmlHeadXtra[] = '
+<script>
+    function showLastTenUsers() {
+        var selectedUsers = [];
+        $("#destination_users option").each(function() {
+            selectedUsers.push($(this).val());
+        });
+
+        if (selectedUsers.length === 0) {
+            selectedUsers.push(0);
+        }
+
+        var idSession = "'.(int) $id_session.'";
+        $.post("'.api_get_self().'",
+        {
+            action: "get_last_ten_users",
+            excludedUsers: selectedUsers,
+            id_session: idSession,
+            add: "",
+            add_type: "multiple"
+        }, function(data) {
+            console.log(data);
+            var select = document.getElementById("origin_users");
+            select.innerHTML = "";
+            $.each(data, function(index, user) {
+                select.append(new Option(user.username + " - " + user.firstname + " " + user.lastname, user.id));
+            });
+        }, "json").fail(function(xhr, status, error) {
+            console.error("Error en la solicitud AJAX: " + error);
+            console.log(xhr.responseText);
+        });
+    }
+
+    function loadAllUsers() {
+        var selectedUsers = [];
+
+        $("#destination_users option").each(function() {
+            selectedUsers.push($(this).val());
+        });
+
+        if (selectedUsers.length === 0) {
+            selectedUsers.push(0);
+        }
+
+        var idSession = "'.(int) $id_session.'";
+        $.post("'.api_get_self().'",
+        {
+            action: "get_all_users",
+            excludedUsers: selectedUsers,
+            id_session: idSession,
+            add: "",
+            add_type: "multiple"
+        }, function(data) {
+            var select = document.getElementById("origin_users");
+            select.innerHTML = "";
+
+            $.each(data, function(index, user) {
+                select.append(new Option(user.username + " - " + user.firstname + " " + user.lastname, user.id));
+            });
+        }, "json").fail(function(xhr, status, error) {
+            console.error("Error en la solicitud AJAX: " + error);
+        });
+    }
+
+    $(document).ready(function() {
+        loadAllUsers();
+        $("#show_last_ten_users_button").on("click", showLastTenUsers);
+        $("#reset_users_button").on("click", loadAllUsers);
+    });
+</script>
+';
 
 $form_sent = 0;
 $errorMsg = $firstLetterUser = $firstLetterSession = '';
@@ -691,6 +798,14 @@ $newLinks .= Display::url(
                         <?php
                         echo Display::get_alphabet_options(); ?>
                     </select>
+                    <span class="input-group-btn">
+                        <button class="btn btn-default" type="button" id="show_last_ten_users_button" title="<?php echo get_lang('ShowLastTenUsers') ?>">
+                            <i class="fa fa-clock-o"></i>
+                        </button>
+                        <button class="btn btn-default" type="button" id="reset_users_button" title="<?php echo get_lang('Reset') ?>">
+                            <i class="fa fa-refresh"></i>
+                        </button>
+                    </span>
                     <br/>
                     <br/>
                 <?php