Merge pull request #232603 from GitaraniSharma-MSFT/patch-76

(AzureCXP) MicrosoftDocs/azure-docs#107120

Author: prmerger-automator[bot]

articles/web-application-firewall/ag/associate-waf-policy-existing-gateway.md

@@ -14,6 +14,9 @@ ms.author: victorh
 
 You can use Azure PowerShell to [create a WAF Policy](create-waf-policy-ag.md), but you might already have an Application Gateway and just want to associate a WAF Policy to it. In this article, you do just that; you create a WAF Policy and associate it to an already existing Application Gateway. 
 
+ > [!NOTE]
+ > The WAF policy must be in the same region and subscription as the Application Gateway for it to be associated.
+
 1. Get your Application Gateway and Firewall Policy. If you don't have an existing Firewall Policy, see step 2. 
 
    ```azurepowershell-interactive