updated note

Author: v-hagamp

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

@@ -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/).
 * Vyond 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.