diff --git a/windows/security/threat-protection/microsoft-defender-atp/symantec-to-microsoft-defender-atp-setup.md b/windows/security/threat-protection/microsoft-defender-atp/symantec-to-microsoft-defender-atp-setup.md
index 124cbc101a..966659047d 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/symantec-to-microsoft-defender-atp-setup.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/symantec-to-microsoft-defender-atp-setup.md
@@ -62,6 +62,8 @@ Now that you're moving from Symantec to Microsoft Defender ATP, you'll need to e
 
 ### Set Microsoft Defender Antivirus to passive mode on Windows Server
 
+Because your organization is still using Symantec, you must set Microsoft Defender Antivirus to passive mode. That way, Symantec and Microsoft Defender Antivirus can run side by side until you have finished onboarding to Microsoft Defender ATP.
+
 1. Open Registry Editor, and then navigate to <br/>
    `Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Windows Advanced Threat Protection`.