I discussed how you could use Ansible with Terraform to simplify configuration management in my previous post. If, instead of Terraform, you prefer using Azure Resource Manager (ARM) templates to define the infrastructure and configuration for your project, you can use Ansible for managing parameters that customize each environment by dynamically generating a Resource Manager parameters file.
A great thing about using Ansible for your ARM configuration needs is that it includes a suite of modules for interacting with Azure Resource Manager. You can install the modules using Ansible Galaxy, a repository of Ansible Roles that you can drop directly in your Playbooks.