diff --git a/datamodels/2.x/itop-oauth-client/src/Service/PopupMenuExtension.php b/datamodels/2.x/itop-oauth-client/src/Service/PopupMenuExtension.php
index b2d16538f..a62a3b59a 100644
--- a/datamodels/2.x/itop-oauth-client/src/Service/PopupMenuExtension.php
+++ b/datamodels/2.x/itop-oauth-client/src/Service/PopupMenuExtension.php
@@ -50,7 +50,7 @@ class PopupMenuExtension implements \iPopupMenuExtension
 
 					if ($bHasToken) {
 						$aScopes = $oObj->Get('scope')->GetValues();
-						if (in_array('IMAP', $aScopes)) {
+						if (in_array('IMAP', $aScopes) && class_exists('MailInboxOAuth')) {
 							$aParams = $oAppContext->GetAsHash();
 							$sMenu = 'Menu:CreateMailbox';
 							$sObjClass = get_class($oObj);