azurerm_management_group_subscription_association - could not read properties for Management Group

[chammock]

Is there an existing issue for this?

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Terraform Version

1.5.5

AzureRM Provider Version

3.73.0

Affected Resource(s)/Data Source(s)

azurerm_management_group_subscription_association

Terraform Configuration Files

terraform {
  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = "~>3.0"
    }
  }
}

provider "azurerm" {
  skip_provider_registration = true
  features {}
}

resource "azurerm_management_group" "example" {
  display_name = "example"
}

data "azurerm_billing_mca_account_scope" "example" {
  billing_account_name = "X"
  billing_profile_name = "X"
  invoice_section_name = "X"
}

resource "azurerm_subscription" "example" {
  subscription_name = "My Example MPA Subscription"
  billing_scope_id  = data.azurerm_billing_mca_account_scope.example.id
}

data "azurerm_subscription" "example" {
  subscription_id = azurerm_subscription.example.subscription_id
}

resource "azurerm_management_group_subscription_association" "example" {
  management_group_id = azurerm_management_group.example.id
  subscription_id     = data.azurerm_subscription.example.id
}

Debug Output/Panic Output

Planning failed. Terraform encountered an error while generating this plan.

╷
│ Error: could not read properties for Management Group "X"
│
│   with azurerm_management_group_subscription_association.example,
│   on main.tf line 31, in resource "azurerm_management_group_subscription_association" "example":
│   31: resource "azurerm_management_group_subscription_association" "example" {

Expected Behaviour

During the provider read of azurerm_management_group_subscription_association , if the expected Management Group has no children, it should be treated as an empty list instead of an error. Then because the expected Subscription is not a child of the Management Group, the Subscription should be re-associated to the proper Management Group. Error is here where instead the provider errors out if the Management Group's children are empty, whereas instead of an error the children list should just be set to an empty list. Then later found would be considered false and the Management Group ID set to empty forcing the re-association.

Actual Behaviour

When a Terraform plan or apply is run after the Subscription is manually moved, outside of Terraform's control, and thus the Management Group has no other children Subscriptions, Terraform produces the following error message ``.

Steps to Reproduce

1. Run above provided Terraform configuration terraform apply
2. Manually move the Subscription to a different Management Group (IE through the Portal)
3. Run terraform plan and error occures

Important Factoids

No response

References

https://github.com/hashicorp/terraform-provider-azurerm/blob/main/internal/services/managementgroup/subscription_association_resource.go#L123

[rcskosir]

@chammock Thank you for taking time to open this issue. Please subscribe to #23335 that @teowa has opened to fix this issue.

[github-actions]

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