Update active-directory-aadconnect-pass-through-authentication-quick-start.md

Author: swkrish

articles/active-directory/connect/active-directory-aadconnect-pass-through-authentication-quick-start.md

@@ -12,7 +12,7 @@ ms.workload: identity
 ms.tgt_pltfrm: na
 ms.devlang: na
 ms.topic: article
-ms.date: 07/26/2018
+ms.date: 08/03/2018
 ms.component: hybrid
 ms.author: billmath
 ---
@@ -57,6 +57,7 @@ Ensure that the following prerequisites are in place.
     | --- | --- |
     | **80** | Downloads the certificate revocation lists (CRLs) while validating the SSL certificate |
     | **443** | Handles all outbound communication with the service |
+    | **8080** (optional) | Authentication Agents report status back to our service over port 8080, if port 443 is unavailable. This happens every 10 minutes and is used to report agent status on the Azure AD portal. This port is not used for user sign-ins. |
 
     If your firewall enforces rules according to the originating users, open these ports for traffic from Windows services that run as a network service.
    - If your firewall or proxy allows DNS whitelisting, whitelist connections to **\*.msappproxy.net** and **\*.servicebus.windows.net**. If not, allow access to the [Azure datacenter IP ranges](https://www.microsoft.com/download/details.aspx?id=41653), which are updated weekly.