Stores the state as a Blob with the given Key within the Blob Container within [the Blob Storage Account](https://docs.microsoft.com/azure/storage/common/storage-introduction). This backend also supports state locking and consistency checking via native capabilities of Azure Blob Storage.
-> **NOTE:** When using a Service Principal or an Access Key - we recommend using a [Partial Configuration](/docs/backends/config.html) for the credentials.
*`storage_account_name` - (Required) The Name of [the Storage Account](https://www.terraform.io/docs/providers/azurerm/r/storage_account.html).
*`container_name` - (Required) The Name of [the Storage Container](https://www.terraform.io/docs/providers/azurerm/r/storage_container.html) within the Storage Account.
*`key` - (Required) The name of the Blob used to retrieve/store Terraform's State file inside the Storage Container.
*`environment` - (Optional) The Azure Environment which should be used. This can also be sourced from the `ARM_ENVIRONMENT` environment variable. Possible values are `public`, `china`, `german`, `stack` and `usgovernment`. Defaults to `public`.
---
When authenticating using the Storage Account's Access Key - the following fields are also supported:
*`access_key` - (Optional) The Access Key used to access the Blob Storage Account. This can also be sourced from the `ARM_ACCESS_KEY` environment variable.
---
When authenticating using a Service Principal - the following fields are also supported:
*`resource_group_name` - (Required) The Name of the Resource Group in which the Storage Account exists.
*`arm_client_id` - (Optional) The Client ID of the Service Principal. This can also be sourced from the `ARM_CLIENT_ID` environment variable.
*`arm_client_secret` - (Optional) The Client Secret of the Service Principal. This can also be sourced from the `ARM_CLIENT_SECRET` environment variable.
*`arm_subscription_id` - (Optional) The Subscription ID in which the Storage Account exists. This can also be sourced from the `ARM_SUBSCRIPTION_ID` environment variable.
*`arm_tenant_id` - (Optional) The Tenant ID in which the Subscription exists. This can also be sourced from the `ARM_TENANT_ID` environment variable.