Merge pull request #302458 from sujamiya/fix/fwmdeployment-overview

Fix sentence in deployment overview

Author: prmerger-automator[bot]

articles/firewall-manager/deployment-overview.md

@@ -25,7 +25,7 @@ To review network architecture options, see [What are the Azure Firewall Manager
 <br>*or*<br>
     - Derive a base policy and customize a local policy
 <br>*or*<br>
-    - Import rules from an existing Azure Firewall. Make sure to remove NAT rules from policies that should be applied across multiple firewalls
+    - Import rules from an existing Azure Firewall (Classic). By design, importing rules from an existing Firewall Policy is not supported by design. Note: NAT rules should be removed from policies intended for use across multiple firewalls. 
 1. Create your hub and spoke architecture
    - Create a Hub Virtual Network using Azure Firewall Manager and peer spoke virtual networks to it using virtual network peering
 <br>*or*<br>