diff --git a/datamodels/2.x/itop-portal-base/portal/src/EventListener/UserProvider.php b/datamodels/2.x/itop-portal-base/portal/src/EventListener/UserProvider.php
index 7e5131a58..df2dd6d2b 100644
--- a/datamodels/2.x/itop-portal-base/portal/src/EventListener/UserProvider.php
+++ b/datamodels/2.x/itop-portal-base/portal/src/EventListener/UserProvider.php
@@ -65,6 +65,10 @@ class UserProvider implements ContainerAwareInterface
 	public function onKernelRequest(GetResponseEvent $oGetResponseEvent)
 	{
 		// User pre-checks
+		// Note: The following note and handling of the $iExitMethod were for the old login mechanism
+		// and hasn't been reworked after the introduction of the new one as we saw it too late.
+		// $iExitMethod and $iLogonRes may be useless now as the DoLoginEx method exits directly sometimes.
+		//
 		// Note: At this point the Exception handler is not registered, so we can't use $oApp::abort() method, hence the die().
 		// - Checking user rights and prompt if needed (401 HTTP code returned if XHR request)
 		$iExitMethod = ($oGetResponseEvent->getRequest()->isXmlHttpRequest()) ? LoginWebPage::EXIT_RETURN : LoginWebPage::EXIT_PROMPT;
diff --git a/datamodels/2.x/itop-portal-base/portal/templates/layout.html.twig b/datamodels/2.x/itop-portal-base/portal/templates/layout.html.twig
index 816f6fe1a..e8395a953 100644
--- a/datamodels/2.x/itop-portal-base/portal/templates/layout.html.twig
+++ b/datamodels/2.x/itop-portal-base/portal/templates/layout.html.twig
@@ -466,6 +466,10 @@
 			
 			$(document).ready(function(){
 				{% block pPageReadyScripts %}
+					// Add proprietary header to identify our XHR calls
+					$(document).ajaxSend(function(oEvent, oXHR, oOptions) {
+						oXHR.setRequestHeader('X-Combodo-Ajax', 'true');
+					});
 					// Handle AJAX errors (exceptions (500), logout (401), ...)
 					$(document).ajaxError(function(oEvent, oXHR, oSettings, sError){
 					    if(oXHR.status === 401)