Merge pull request #101159 from MicahMcKittrick-MSFT/patch-326

MicrosoftDocs/azure-docs#32846

Author: PRMerger19

articles/virtual-machines/extensions/agent-windows.md

@@ -66,7 +66,9 @@ $vm | Update-AzVM
 ```
 
 ### Prerequisites
-The Windows VM Agent needs at least Windows Server 2008 R2 (64-bits) to run, with the .Net Framework 4.0. See [Minimum version support for virtual machine agents in Azure](https://support.microsoft.com/en-us/help/4049215/extensions-and-virtual-machine-agent-minimum-version-support)
+- The Windows VM Agent needs at least Windows Server 2008 R2 (64-bits) to run, with the .Net Framework 4.0. See [Minimum version support for virtual machine agents in Azure](https://support.microsoft.com/en-us/help/4049215/extensions-and-virtual-machine-agent-minimum-version-support)
+
+- Ensure your VM has access to IP address 168.63.129.16. For more information see [What is IP address 168.63.129.16](https://docs.microsoft.com/azure/virtual-network/what-is-ip-address-168-63-129-16).
 
 ## Detect the VM Agent