Merge pull request #6 from nishankgu/patch-22

Update concept-enterprise-security.md

Author: Larry Franks

articles/machine-learning/concept-enterprise-security.md

@@ -129,6 +129,8 @@ To use your own (customer-managed) keys to encrypt the Azure Cosmos DB instance,
 
 To enable provisioning a Cosmos DB instance in your subscription with customer-managed keys, perform the following actions:    
 
+* Register the Azure Machine Learning and Azure Cosmos DB resource providers in your subscription, if not done already.
+
 * Authorize the Machine Learning App (in Identity and Access Management) with contributor permissions on your subscription.
 
     ![Authorize the 'Azure Machine Learning App' in Identity and Access Management in the portal](./media/concept-enterprise-security/authorize-azure-machine-learning.png)