Explanation/Reference:
Explanation:
Example: scenario where a customer wishes to explore a move from an existing Hortonworks (HDP) cluster to an Azure HDInsight (HDI) cluster.
With the target Storage account in place, I can now configure the HDP cluster to connect to it. The easiest way I have found to do this is using Ambari:
Login to the Ambari portal and navigate to the (default) dashboard

Select HDFS from the left-hand navigation

On the resulting HDFS page, click on the Configs tab

On the resulting page, select the Advanced option

Scroll down and expand the Custom core-site node

Select Add Property... from the bottom of the expanded node

Enter fs.azure.account.key.<account name>.blob.core.windows.net, substituting the name of the

Storage account for <account name>, as the Name of the property
Enter the Account key as the Value of the property

Click the Add button and verify the new property appears under the Custom core-site node

Locate the notification bar at the top of the current page

Click the Save button on the notification bar to push changes to the cluster

Follow any remaining prompts to complete the Save process

Once the Save process is completed, Ambari will indicate a restart of some services is required. Click

the Restart button and Restart All Affected from the resulting drop-down. Follow any remaining prompts and monitor the process until it is successfully completed.
Reference: https://blogs.msdn.microsoft.com/data_otaku/2016/12/09/pushing-data-from-a-hortonworks- cluster-to-an-azure-hdinsight-cluster/