Merge pull request #110842 from tfitzmac/0409tags

add tag case sensitivity

Author: Jak-MS

articles/azure-resource-manager/management/tag-resources.md

@@ -10,6 +10,9 @@ You apply tags to your Azure resources, resource groups, and subscriptions to lo
 
 For recommendations on how to implement a tagging strategy, see [Resource naming and tagging decision guide](/azure/cloud-adoption-framework/decision-guides/resource-tagging/?toc=/azure/azure-resource-manager/management/toc.json).
 
+> [!IMPORTANT]
+> Tag names are case-insensitive. Tag values are case-sensitive.
+
 [!INCLUDE [Handle personal data](../../../includes/gdpr-intro-sentence.md)]
 
 ## Required access