Answer by Giulio Vian for How to save the azure keyvault certificate to a local folder with terraform?

You may use the azurerm_key_vault_certificate_data data source.

Example from the docs

data "azurerm_key_vault" "example" {  name                = "examplekv"  resource_group_name = "some-resource-group"}data "azurerm_key_vault_certificate_data" "example" {  name         = "secret-sauce"  key_vault_id = data.azurerm_key_vault.example.id}output "example_pem" {  value = data.azurerm_key_vault_certificate_data.example.pem}