Add exception to LB limit in footnote

Author: thisisanniefang

includes/azure-virtual-network-limits.md

@@ -78,7 +78,7 @@ The following limits apply only for networking resources managed through Azure R
 | Backend IP configurations per frontend <sup>2<sup> | 10,000                        |
 | Backend IP configurations across all frontends | 500,000 |
 
-<sup>1</sup> An exception to this limit is that 2 public load balancers can be in front of a VM if an IPv4 address config is used for one load balancer and IPv6 address config is used for the second.
+<sup>1</sup> An exception to this limit is that 2 public load balancers can be in front of a VM if an IPv4 address config is used for one load balancer and IPv6 address config is used for the second. Note that this limit does not apply to IP-based load balancers. For more information on IP-based backend pools, refer to our documentation on [IP-based load balancers](../articles/load-balancer/backend-pool-management.md).
 
 <sup>2</sup> Backend IP configurations are aggregated across all load balancer rules including load balancing, inbound NAT, and outbound rules. Each rule a backend pool instance is configured to counts as one configuration.