Update vpn-gateway-howto-setup-alerts-virtual-network-gateway-log.md

Author: dcbrown16

articles/vpn-gateway/vpn-gateway-howto-setup-alerts-virtual-network-gateway-log.md

@@ -22,7 +22,7 @@ The following logs are available in Azure:
 |TunnelDiagnosticLog | Contains tunnel state change events. Tunnel connect/disconnect events have a summarized reason for the state change if applicable |
 |RouteDiagnosticLog | Logs changes to static routes and BGP events that occur on the gateway |
 |IKEDiagnosticLog | Logs IKE control messages and events on the gateway |
-|P2SDiagnosticLog | Logs point-to-site control messages and events on the gateway |
+|P2SDiagnosticLog | Logs point-to-site control messages and events on the gateway. Connection source info is provided for IKEv2 connections only |
 
 ## <a name="setup"></a>Set up alerts in the Azure portal