first draft of changes

Author: johnmarco

articles/azure-arc/servers/overview.md

@@ -7,7 +7,10 @@ ms.topic: overview
 
 # What is Azure Arc-enabled servers?
 
-Azure Arc-enabled servers lets you manage Windows and Linux physical servers and virtual machines hosted *outside* of Azure, on your corporate network, or other cloud provider. This management experience is designed to be consistent with how you manage native Azure virtual machines, using standard Azure constructs such as Azure Policy and applying tags.
+Azure Arc-enabled servers lets you manage Windows and Linux physical servers and virtual machines hosted *outside* of Azure, on your corporate network, or other cloud provider. For the purposes of Azure Arc, these machines hosted outside of Azure are considered hybrid machines. The management of hybrid machines is designed to be consistent with how you manage native Azure virtual machines, using standard Azure constructs such as Azure Policy and applying tags.
+
+> [!NOTE]
+> For additional information about hybrid environments, see [What is a hybrid cloud?](/resources/cloud-computing-dictionary/what-is-hybrid-cloud-computing.md)
 
 When a hybrid machine is connected to Azure, it becomes a connected machine and is treated as a resource in Azure. Each connected machine has a Resource ID enabling the machine to be included in a resource group.