Merge pull request #212782 from batamig/patch-241

adding preview notice

Author: prmerger-automator[bot]

articles/sentinel/iot-advanced-threat-monitoring.md

@@ -19,6 +19,10 @@ In this tutorial, you:
 > * Learn how to investigate Defender for IoT alerts in Microsoft Sentinel incidents
 > * Learn about the analytics rules, workbooks, and playbooks deployed to your Microsoft Sentinel workspace with the **Microsoft Defender for IoT** solution
 
+> [!IMPORTANT]
+>
+> The Microsoft Sentinel content hub experience is currently in **PREVIEW**, as is the **Microsoft Defender for IoT** solution. See the [Supplemental Terms of Use for Microsoft Azure Previews](https://azure.microsoft.com/support/legal/preview-supplemental-terms/) for additional legal terms that apply to Azure features that are in beta, preview, or otherwise not yet released into general availability.
+
 ## Prerequisites
 
 Before you start, make sure you have: