Choose an Azure Subscription in your environment where you would like to install CloudMonitor. This is NOT the Subscriptions that you want to monitor, just where you want to put the CloudMonitor Application.
For example, if you are trialing it, you might install it on a DEV Subscription, whereas if you are monitoring production resources you might want to install it on a Production Subscription.
In our example below we are using a Subscription called "IE - MPN".