update

Author: v-nagta

articles/active-directory/saas-apps/whimsical-tutorial.md

@@ -13,7 +13,7 @@ ms.subservice: saas-app-tutorial
 ms.workload: identity
 ms.tgt_pltfrm: na
 ms.topic: tutorial
-ms.date: 05/13/2020
+ms.date: 05/15/2020
 ms.author: jeedes
 
 ms.collection: M365-identity-device-management
@@ -36,6 +36,9 @@ To get started, you need the following items:
 * An Azure AD subscription. If you don't have a subscription, you can get a [free account](https://azure.microsoft.com/free/).
 * Whimsical single sign-on (SSO) enabled subscription.
 
+> [!NOTE]
+> Identifier of this application is a fixed string value so only one instance can be configured in one tenant.
+
 ## Scenario description
 
 In this tutorial, you configure and test Azure AD SSO in a test environment.