Merge pull request #124484 from MicrosoftAzureAaron/patch-3

Update application-gateway-probe-overview.md

Author: Jak-MS

articles/application-gateway/application-gateway-probe-overview.md

@@ -46,7 +46,7 @@ Once the probe detects a failed response, the counter for "Unhealthy threshold"
 
 An application gateway automatically configures a default health probe when you don't set up any custom probe configuration. The monitoring behavior works by making an HTTP GET request to the IP addresses or FQDN configured in the backend pool. For default probes if the backend http settings are configured for HTTPS, the probe uses HTTPS to test health of the backend servers.
 
-For example: You configure your application gateway to use backend servers A, B, and C to receive HTTP network traffic on port 80. The default health monitoring tests the three servers every 30 seconds for a healthy HTTP response with a 30-second-timeout for each request. A healthy HTTP response has a [status code](/troubleshoot/developer/webapps/iis/www-administration-management/http-status-code) between 200 and 399. In this case, the HTTP GET request for the health probe looks like `http://127.0.0.1/`. Also see [HTTP response codes in Application Gateway](http-response-codes.md).
+For example: You configure your application gateway to use backend servers A, B, and C to receive HTTP network traffic on port 80. The default health monitoring tests the three servers every 30 seconds for a healthy HTTP response with a 30-second-timeout for each request. A healthy HTTP response has a [status code](/troubleshoot/developer/webapps/iis/www-administration-management/http-status-code) between 200 and 399. In this case, the HTTP GET host header for the health probe looks like `http://127.0.0.1/`. Also see [HTTP response codes in Application Gateway](http-response-codes.md).
 
 If the default probe check fails for server A, the application gateway stops forwarding requests to this server. The default probe still continues to check for server A every 30 seconds. When server A responds successfully to one request from a default health probe, application gateway starts forwarding the requests to the server again.