NPM and SSH User Docs Update

Author: allyford

articles/aks/use-network-policies.md

@@ -108,7 +108,6 @@ Please execute the following commands prior to creating a cluster:
 ```azurecli
  az extension add --name aks-preview
  az extension update --name aks-preview
- az feature register --namespace Microsoft.ContainerService --name AKSWindows2022Preview
  az feature register --namespace Microsoft.ContainerService --name WindowsNetworkPolicyPreview
  az provider register -n Microsoft.ContainerService
 ```

articles/aks/windows-faq.md

@@ -72,6 +72,10 @@ To fix this error:
 1. Move Windows pods from existing Windows agent pools to new Windows agent pools.
 1. Delete old Windows agent pools.
 
+## Why is there an unexpected user named "sshd" on my VM node?
+
+AKS adds a user named "sshd" when installing the OpenSSH service. This user is not malicious. We recommend that customers update their alerts to ignore this unexpected user account.
+
 ## How do I rotate the service principal for my Windows node pool?
 
 Windows node pools do not support service principal rotation. To update the service principal, create a new Windows node pool and migrate your pods from the older pool to the new one. After your pods are migrated to the new pool, delete the older node pool.