diff --git a/windows/security/threat-protection/windows-defender-antivirus/configure-extension-file-exclusions-windows-defender-antivirus.md b/windows/security/threat-protection/windows-defender-antivirus/configure-extension-file-exclusions-windows-defender-antivirus.md
index 492af0b7b7..7e70db0e6b 100644
--- a/windows/security/threat-protection/windows-defender-antivirus/configure-extension-file-exclusions-windows-defender-antivirus.md
+++ b/windows/security/threat-protection/windows-defender-antivirus/configure-extension-file-exclusions-windows-defender-antivirus.md
@@ -20,6 +20,9 @@ ms.date: 12/10/2018
 
 - [Windows Defender Advanced Threat Protection (Windows Defender ATP)](https://go.microsoft.com/fwlink/p/?linkid=2069559)
 
+> [!IMPORTANT]
+> [Windows Defender Advanced Threat Protection ](https://docs.microsoft.com/windows/security/threat-protection/windows-defender-atp/defender-compatibility-windows-defender-advanced-threat-protection) does not adhere to Windows Defender Antivirus exclusion settings. This means that any Windows Defender exclusions, no matter how you created them, are not applied by Windows Defender ATP.
+
 You can exclude certain files from Windows Defender Antivirus scans by modifying exclusion lists.
 
 Generally, you shouldn't need to apply exclusions. Windows Defender Antivirus includes a number of automatic exclusions based on known operating system behaviors and typical management files, such as those used in enterprise management, database management, and other enterprise scenarios and situations.