diff --git a/windows/security/includes/microsoft-defender.md b/windows/security/includes/microsoft-defender.md
index ff59512a8b..f11b229d47 100644
--- a/windows/security/includes/microsoft-defender.md
+++ b/windows/security/includes/microsoft-defender.md
@@ -1,7 +1,7 @@
 ---
 title: Microsoft Defender important guidance
 description: A note in regard to important Microsoft Defender guidance.
-ms.date: 09/21/2020
+ms.date: 
 ms.reviewer: 
 manager: dansimp
 ms.author: dansimp
@@ -9,3 +9,6 @@ author: dansimp
 ms.prod: w10
 ms.topic: include
 ---
+
+> [!IMPORTANT]
+> The improved [Microsoft 365 security center](https://security.microsoft.com) is now available in public preview. This new experience brings Defender for Endpoint, Defender for Office, 365 Microsoft 365 Defender, and more into the Microsoft 365 security center. [Learn what's new](https://docs.microsoft.com/microsoft-365/security/mtp/overview-security-center). This topic might apply to both Microsoft Defender for Endpoint and Microsoft 365 Defender. Refer to the **Applies To** section and look for specific call outs in this article where there might be differences.