Update azure-virtual-network-limits.md

Author: anavinahar

includes/azure-virtual-network-limits.md

@@ -67,10 +67,12 @@ The following limits apply only for networking resources managed through Azure R
 | Rules per NIC (across all IPs on a NIC) | 300                           |
 | Frontend IP configurations              | 600                           |
 | Backend pool size                       | 1,000 IP configurations, single virtual network |
+| Backend resources per Load Balancer <sup>1<sup> | 150                   |
 | High-availability ports                 | 1 per internal frontend       |
 | Outbound rules per Load Balancer        | 20                            |
 | [TCP idle timeout](https://docs.microsoft.com/azure/load-balancer/load-balancer-tcp-idle-timeout#tcp-idle-timeout) | 4 minutes/30 minutes          |
 
+<sup>1</sup>The limit is up to 150 resources, in any combination of standalone virtual machine resources, availability set resources, and virtual machine scale-set resources.
 
 **Basic Load Balancer**