small change clarifying prefix use with LB

Author: brianlehr

articles/virtual-network/ip-services/public-ip-address-prefix.md

@@ -59,7 +59,7 @@ The following resources utilize a public IP address prefix:
 Resource|Scenario|Steps|
 |---|---|---|
 |Virtual Machine Scale Sets | You can use a public IP address prefix to generate instance-level IPs in a Virtual Machine Scale Set. Individual public IP resources aren't created. | Use a [template](https://github.com/Azure/azure-quickstart-templates/tree/master/quickstarts/microsoft.compute/vmss-with-public-ip-prefix) with instructions to use this prefix for public IP configuration as part of the scale set creation. (Zonal properties of the prefix are passed to the instance IPs and aren't shown in the output. For more information, see [Networking for Virtual Machine Scale Sets](../../virtual-machine-scale-sets/virtual-machine-scale-sets-networking.md#public-ipv4-per-virtual-machine)) |
-| Standard load balancers | A public IP address prefix can be used to scale a load balancer by [using all IPs in the range for outbound connections](../../load-balancer/outbound-rules.md#scale). | To associate a prefix to your load balancer: </br> 1. [Create a prefix.](manage-public-ip-address-prefix.md) </br> 2. When creating the load balancer, select the IP prefix as associated with the frontend of your load balancer. |
+| Standard load balancers | A public IP address prefix can be used to scale a load balancer by [using all IPs in the range for outbound connections](../../load-balancer/outbound-rules.md#scale). Note that the prefix cannot be used for inbound connections, only outbound. | To associate a prefix to your load balancer: </br> 1. [Create a prefix.](manage-public-ip-address-prefix.md) </br> 2. When creating the load balancer, select the IP prefix as associated with the frontend of your load balancer. |
 | NAT Gateway | A public IP prefix can be used to scale a NAT gateway by using the public IPs in the prefix for outbound connections. | To associate a prefix to your NAT Gateway: </br> 1. [Create a prefix.](manage-public-ip-address-prefix.md) </br> 2. When creating the NAT Gateway, select the IP prefix as the Outbound IP.  (A NAT Gateway can have no more than 16 IPs in total. A public IP prefix of /28 length is the maximum size that can be used.) |
 
 ## Limitations