Update howto-azure-operator-nexus-prerequisites.md

Add registration

Author: JAC0BSMITH

articles/operator-nexus/howto-azure-operator-nexus-prerequisites.md

@@ -39,6 +39,7 @@ Install latest version of the
 Ensure access to the necessary Azure Resource Providers for the Azure Subscription for Operator Nexus resources. Register the following providers:
 
 ```Azure CLI
+az provider register --namespace Microsoft.AzureArcData
 az provider register --namespace Microsoft.Compute
 az provider register --namespace Microsoft.ContainerService
 az provider register --namespace Microsoft.ExtendedLocation