Merge pull request #57102 from iainfoulds/akscidroverlap

[AKS] Add note on overlapping CIDR ranges

Author: PRMerger15

articles/aks/configure-advanced-networking.md

@@ -78,7 +78,7 @@ When you create an AKS cluster, the following parameters are configurable for ad
 
 **Virtual network**: The virtual network into which you want to deploy the Kubernetes cluster. If you want to create a new virtual network for your cluster, select *Create new* and follow the steps in the *Create virtual network* section. For information about the limits and quotas for an Azure virtual network, see [Azure subscription and service limits, quotas, and constraints](../azure-subscription-service-limits.md#azure-resource-manager-virtual-networking-limits).
 
-**Subnet**: The subnet within the virtual network where you want to deploy the cluster. If you want to create a new subnet in the virtual network for your cluster, select *Create new* and follow the steps in the *Create subnet* section.
+**Subnet**: The subnet within the virtual network where you want to deploy the cluster. If you want to create a new subnet in the virtual network for your cluster, select *Create new* and follow the steps in the *Create subnet* section. For hybrid connectivity, the address range shouldn't overlap with any other virtual networks in your environment.
 
 **Kubernetes service address range**: This is the set of virtual IPs that Kubernetes assigns to [services][services] in your cluster. You can use any private address range that satisfies the following requirements: