azurerm_data_protection_backup_vault datastore_type creation failure for ArchiveStore

[aaronmiller-lab3]

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When selecting datastore_type = ArchiveStore
the azure API is rejecting it as requires the data store type to have vault store as well as archive store

Terraform Version

1.14.6

AzureRM Provider Version

4.64.0

Affected Resource(s)/Data Source(s)

azurerm_data_protection_backup_vault

Terraform Configuration Files

resource "azurerm_data_protection_backup_vault" "geo-archive" {
  name                = "bv-geo-ArchiveStore"
  resource_group_name = "BUP"
  location            = "australiaeast"
  datastore_type      = "ArchiveStore"
  redundancy          = "GeoRedundant"

  tags = {
    environment = "dev"
  }
}


To successfully deploy via azapi had to add a concat to the storagesettigns 

NEW
      storageSettings = concat(
        [{
          datastoreType = var.datastore_type
          type          = var.redundancy
        }],
        var.datastore_type == "ArchiveStore" ? [{
          datastoreType = "VaultStore"
          type          = var.redundancy
        }] : []
      )
OLD
  body = {
    properties = {
      storageSettings = [{
        datastoreType = var.datastore_type
        type          = var.redundancy
      }]

Debug Output/Panic Output

When using azurerm the following error is received

 Error: creating DataProtection BackupVault ("Backup Vault (Subscription: \"d89d232b-f2c8-415e-b1a1-d8b8e4301ece\"\nResource Group Name: \"BUP\"\nBackup Vault Name: \"bv-geo-ArchiveStore\")"): performing BackupVaultsCreateOrUpdate: unexpected status 406 (406 Not Acceptable) received with no body
│
│   with module.backup_vault_zone_OperationalStore.azurerm_data_protection_backup_vault.geo-archive,
│   on modules\azurerm_dp_backup_vault\test-rm.tf line 3, in resource "azurerm_data_protection_backup_vault" "geo-archive":
│    3: resource "azurerm_data_protection_backup_vault" "geo-archive" {

When attempting to use azapi to create the same resource configuration the following error is received, using old code
--------------------------------------------------------------------------------
│ RESPONSE 400: 400 Bad Request
│ ERROR CODE: BMSUserErrorOnlyArchiveStoreSentForStorageSettings
│ --------------------------------------------------------------------------------
│ {
│   "error": {
│     "additionalInfo": [
│       {
│         "type": "UserFacingError",
│         "info": {
│           "message": "Only ArchiveStore in StorageSettings is not allowed.",
│           "recommendedAction": [
│             "Please retry the operation after adding VaultStore in StorageSettings."
│           ],
│           "details": null,
│           "code": "BMSUserErrorOnlyArchiveStoreSentForStorageSettings",
│           "target": "",
│           "innerError": null,
│           "isRetryable": false,
│           "isUserError": false,
│           "properties": {
│             "ActivityId": "edfff86b-aa64-453b-91ca-c52cf7b5515c"
│           }
│         }
│       }
│     ],
│     "code": "BMSUserErrorOnlyArchiveStoreSentForStorageSettings",
│     "message": "Only ArchiveStore in StorageSettings is not allowed.",
│     "target": null,
│     "details": null
│   }
│ }
│ --------------------------------------------------------------------------------

Expected Behaviour

expected behaviour is to have backup vault created using azurerm resource this one was created using API with additional code fix

Actual Behaviour

Backup vault configured as ArchiveStore unable to be created unless using azapi

Steps to Reproduce

No response

Important Factoids

australia east region is in preview for secure by default for backup vault this is scheduled to be going global GA end of march 2026

References

No response

[ziyeqf]

Hi @aaronmiller-lab3, thanks for opening the issue.

I have submitted a PR(#31985) for this, once it merged the ArchiveStore shall work.

Thanks