updated article

Author: MGoedtel

articles/azure-arc/servers/manage-agent.md

@@ -6,7 +6,7 @@ ms.service: azure-arc
 ms.subservice: azure-arc-servers
 author: mgoedtel
 ms.author: magoedte
-ms.date: 04/13/2020
+ms.date: 04/14/2020
 ms.topic: conceptual
 ---
 
@@ -126,7 +126,7 @@ The Azcmagent tool (Azcmagent.exe) is used to configure the Azure Arc for server
 
 * **-v or --verbose** - Enable verbose logging
 
-You can perform a **Connect**, **Disconnect**, and **Reconnect** manually while logged on interactively, or automate using the same service principal you used to onboard multiple agents or with a Microsoft identity platform [access token](../../active-directory/develop/access-tokens.md).
+You can perform a **Connect**, **Disconnect**, and **Reconnect** manually while logged on interactively, or automate using the same service principal you used to onboard multiple agents or with a Microsoft identity platform [access token](../../active-directory/develop/access-tokens.md). If you did not use a service principal to register the machine with Azure Arc for servers (preview), see the following [article](onboard-service-principal.md#create-a-service-principal-for-onboarding-at-scale) to create a service principal.
 
 ### Connect