diff --git a/windows/security/threat-protection/microsoft-defender-atp/troubleshoot-live-response.md b/windows/security/threat-protection/microsoft-defender-atp/troubleshoot-live-response.md
index 2501fffa63..3352e19c6c 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/troubleshoot-live-response.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/troubleshoot-live-response.md
@@ -56,6 +56,7 @@ If while trying to take an action during a live response session, you encounter
 Live response is leveraging MDATP sensor registration with WNS service in Windows. 
 If you are having connectivity issues with live response, please confirm the following:
 1. notify.windows.com is not blocked in your environment.
+https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-atp/configure-proxy-internet#enable-access-to-microsoft-defender-atp-service-urls-in-the-proxy-server
 2. WpnService (Windows Push Notifications System Service) is not disabled.
 
 Please refer to the articles below to fully understand the WpnService service behavior and requirements: