diff --git a/windows/security/threat-protection/microsoft-defender-atp/automated-investigations.md b/windows/security/threat-protection/microsoft-defender-atp/automated-investigations.md
index b9aad84bc9..96cf4bd271 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/automated-investigations.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/automated-investigations.md
@@ -35,6 +35,7 @@ When an alert is triggered, a security playbook goes into effect. Depending on t
 
 >[!NOTE]
 >Currently, automated investigation only supports the following OS versions:
+>- Windows Server 2019
 >- Windows 10, version 1709 (OS Build 16299.1085 with [KB4493441](https://support.microsoft.com/help/4493441/windows-10-update-kb4493441)) or later
 >- Windows 10, version 1803 (OS Build 17134.704 with [KB4493464](https://support.microsoft.com/help/4493464/windows-10-update-kb4493464)) or later
 >- Later versions of Windows 10