add Applies to, change apt to sentence case

windows/keep-secure/investigate-alerts-windows-defender-advanced-threat-protection.md

@@ -23,7 +23,7 @@ There are three alert severity levels, described in the following table.
 
 Alert severity | Description
 :---|:---
-High (Red) | Threats often associated with Advanced Persistent Threats (APT). These alerts indicate a high risk due to the severity of damage they can inflict on endpoints.
+High (Red) | Threats often associated with advanced persistent threats (APT). These alerts indicate a high risk due to the severity of damage they can inflict on endpoints.
 Medium (Orange) | Threats rarely observed in the organization, such as anomalous registry change, execution of suspicious files, and observed behaviors typical of attack stages.
 Low (Yellow) | Threats associated with prevalent malware and hack-tools that do not appear to indicate an advanced threat targeting the organization.
 

windows/keep-secure/windows-defender-advanced-threat-protection.md

@@ -14,6 +14,7 @@ author: mjcaparas
 **Applies to:**
 
 - Windows 10 Insider Preview Build 14332 or later
+- Windows Defender Advanced Threat Protection (Windows Defender ATP)
 
 <span style="color:#ED1C24;">[Some information relates to pre-released product which may be substantially modified before it's commercially released. Microsoft makes no warranties, express or implied, with respect to the information provided here.]</span>