diff --git a/windows/security/threat-protection/windows-defender-atp/onboard-downlevel-windows-defender-advanced-threat-protection.md b/windows/security/threat-protection/windows-defender-atp/onboard-downlevel-windows-defender-advanced-threat-protection.md
index 4fdcb667bb..a08224049b 100644
--- a/windows/security/threat-protection/windows-defender-atp/onboard-downlevel-windows-defender-advanced-threat-protection.md
+++ b/windows/security/threat-protection/windows-defender-atp/onboard-downlevel-windows-defender-advanced-threat-protection.md
@@ -11,7 +11,6 @@ ms.pagetype: security
 ms.author: macapara
 author: mjcaparas
 ms.localizationpriority: medium
-ms.date: 11/19/2018
 ---
 
 # Onboard previous versions of Windows
@@ -30,6 +29,9 @@ ms.date: 11/19/2018
 
 Windows Defender ATP extends support to include down-level operating systems, providing advanced attack detection and investigation capabilities on supported Windows versions.
 
+>[!IMPORTANT]
+>This capability is currently in preview. You'll need to turn on the preview features to take advantage of this feature. For more information, see [Preview features](preview-windows-defender-advanced-threat-protection).
+
 To onboard down-level Windows client endpoints to Windows Defender ATP, you'll need to:
 - Configure and update System Center Endpoint Protection clients.
 - Install and configure Microsoft Monitoring Agent (MMA) to report sensor data to Windows Defender ATP as instructed below.