Set your Azure subscription if you have more than one

How-to-use-Azure-DNS.md

@@ -1,8 +1,9 @@
 #### Prerequisites
 You need the Azure Cli 2.0 tools to create a service principal for access to your DNS Zone.
-Either install Azure Cli 2.0 locally  or use the Azure Cloud Shell
+Either install Azure Cli 2.0 locally or use the Azure Cloud Shell in Bash mode.
 
-See https://docs.microsoft.com/en-us/cli/azure/overview?view=azure-cli-latest
+See [
+Azure Command-Line Interface (CLI) documentation](https://docs.microsoft.com/en-us/cli/azure/overview?view=azure-cli-latest)
 
 #### Log-in to Azure
 (not required when using the Azure Cloud Shell)
@@ -26,6 +27,52 @@ az login
   }
 ]
 ```
+
+#### Set your Azure subscription if you have more than one
+
+```
+az account list
+```
+
+```json
+[
+  {
+    "cloudName": "AzureCloud",
+    "homeTenantId": "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
+    "id": "baaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
+    "isDefault": true,
+    "managedByTenants": [],
+    "name": "Subscription A",
+    "state": "Enabled",
+    "tenantId": "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
+    "user": {
+      "cloudShellID": true,
+      "name": "email@example.com",
+      "type": "user"
+    }
+  },
+  {
+    "cloudName": "AzureCloud",
+    "homeTenantId": "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
+    "id": "caaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
+    "isDefault": false,
+    "managedByTenants": [],
+    "name": "Subscription B",
+    "state": "Enabled",
+    "tenantId": "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
+    "user": {
+      "cloudShellID": true,
+      "name": "email@example.com",
+      "type": "user"
+    }
+  }
+]
+```
+
+```
+az account set --subscription "Subscription B"
+```
+
 #### List your DNS Zones
 
 ```