fixes MicrosoftDocs/azure-docs#55333

Author: tfitzmac

articles/azure-resource-manager/management/resource-name-rules.md

@@ -2,7 +2,7 @@
 title: Resource naming restrictions
 description: Shows the rules and restrictions for naming Azure resources.
 ms.topic: conceptual
-ms.date: 04/22/2020
+ms.date: 05/21/2020
 ---
 
 # Naming rules and restrictions for Azure resources
@@ -692,6 +692,9 @@ In the following tables, the term alphanumeric refers to:
 > | sites | global | 2-60 | Contains alphanumerics and hyphens.<br><br>Can't start or end with hyphen. |
 > | sites / slots | site | 2-59 | Alphanumerics and hyphens. |
 
+> [!NOTE]
+> Azure Functions has the same naming rules and restrictions as Microsoft.Web/sites.
+
 ## Next steps
 
 For recommendations about how to name resources, see [Ready: Recommended naming and tagging conventions](/azure/cloud-adoption-framework/ready/azure-best-practices/naming-and-tagging).