diff --git a/admin/tool/mobile/launch.php b/admin/tool/mobile/launch.php
index 64d3ee8ac4c..51145cf0f14 100644
--- a/admin/tool/mobile/launch.php
+++ b/admin/tool/mobile/launch.php
@@ -69,6 +69,11 @@ if (empty($service)) {
     throw new moodle_exception('servicenotavailable', 'webservice');
 }
 
+// If the user is using the inapp (embedded) browser, we need to set the Secure and Partitioned attributes to the session cookie.
+if (\core_useragent::is_moodle_app()) {
+    \core\session\utility\cookie_helper::add_attributes_to_cookie_response_header('MoodleSession'.$CFG->sessioncookie, ['Secure', 'Partitioned']);
+}
+
 require_login(0, false);
 
 // Require an active user: not guest, not suspended.