Added that the Azure SDN flow count may be different than the guest OS

Author: davegoddard

articles/virtual-network/virtual-machine-network-throughput.md

@@ -55,7 +55,7 @@ Today, the Azure networking stack supports 1M total flows (500k inbound and 500k
 
 Once this limit is hit, other connections are dropped. Connection establishment and termination rates can also affect network performance as connection establishment and termination shares CPU with packet processing routines. We recommend that you benchmark workloads against expected traffic patterns and scale out workloads appropriately to match your performance needs.
 
-Metrics are available in [Azure Monitor](/azure/azure-monitor/essentials/metrics-supported#microsoftcomputevirtualmachines) to track the number of network flows and the flow creation rate on your VM or Virtual Machine Scale Sets instances.
+Metrics are available in [Azure Monitor](/azure/azure-monitor/essentials/metrics-supported#microsoftcomputevirtualmachines) to track the number of network flows and the flow creation rate on your VM or Virtual Machine Scale Sets instances. It is possible that the number of flows tracked by your VM guest OS is different than the number of flows tracked by the Azure network stack for various reasons. To ensure your network connections are not dropped, use the Inbound and Outbound Flows metric.
 
 :::image type="content" source="./media/virtual-machine-network-throughput/azure-monitor-flow-metrics.png" alt-text="A screenshot shows the Metrics page of Azure Monitor with a line chart and totals for inbound and outbound flows.":::