Understanding Azure Policy
Rules are important, but to be sure that they are not broken, you either need to monitor their application or you need to enforce them. With Azure Policy, you get a service that you can use to achieve both. Azure Policy allows you to create, assign, and manage policies. Policies that you define enforce different rules for resources that you create in a policy's scope.
The Azure Policy service evaluates resources for non-compliance with assigned policies and then applies a defined action. For example, you may want to only allow your Azure administrators to create Azure resources in the North Europe and West Europe Azure regions, or you may only want to have a certain VM SKU size in one of your Azure subscriptions. In these cases, you can create a policy. Once this policy is created and activated, new and existing resources are evaluated for policy compliance. New resources can be prevented from being created if they are non-compliant and existing resources...