diff --git a/windows/security/threat-protection/microsoft-defender-application-guard/reqs-md-app-guard.md b/windows/security/threat-protection/microsoft-defender-application-guard/reqs-md-app-guard.md
index 33f69ede20..92960da468 100644
--- a/windows/security/threat-protection/microsoft-defender-application-guard/reqs-md-app-guard.md
+++ b/windows/security/threat-protection/microsoft-defender-application-guard/reqs-md-app-guard.md
@@ -8,7 +8,7 @@ ms.pagetype: security
 ms.localizationpriority: medium
 author: denisebmsft
 ms.author: deniseb
-ms.date: 10/20/2021
+ms.date: 08/25/2022
 ms.reviewer: 
 manager: dansimp
 ms.custom: asr
@@ -31,6 +31,9 @@ The threat landscape is continually evolving. While hackers are busy developing
 
 Your environment must have the following hardware to run Microsoft Defender Application Guard.
 
+> [!NOTE]
+> Application Guard currently isn't supported on Windows 11 ARM64 devices.
+
 | Hardware | Description |
 |--------|-----------|
 | 64-bit CPU|A 64-bit computer with minimum four cores (logical processors) is required for hypervisor and virtualization-based security (VBS). For more info about Hyper-V, see [Hyper-V on Windows Server 2016](/windows-server/virtualization/hyper-v/hyper-v-on-windows-server) or [Introduction to Hyper-V on Windows 10](/virtualization/hyper-v-on-windows/about/). For more info about hypervisor, see [Hypervisor Specifications](/virtualization/hyper-v-on-windows/reference/tlfs).|