updated concurrent updates

Author: rwike77

articles/active-directory/develop/workload-identity-federation-considerations.md

@@ -9,9 +9,9 @@ ms.service: active-directory
 ms.subservice: develop
 ms.workload: identity
 ms.topic: conceptual
-ms.date: 09/27/2022
+ms.date: 02/15/2022
 ms.author: ryanwi
-ms.reviewer: shkhalid, udayh, vakarand, cbrooks
+ms.reviewer: shkhalid, udayh, cbrooks
 ms.custom: aaddev, references_regions
 
 ---
@@ -81,9 +81,13 @@ To avoid this issue, wait a short time after adding the federated identity crede
 
 Creating multiple federated identity credentials under the same user-assigned managed identity concurrently triggers concurrency detection logic, which causes requests to fail with 409-conflict HTTP status code.  
 
+[Terraform Provider for Azure (Resource Manager)](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs) version 3.40.0 introduces an [update](https://github.com/hashicorp/terraform-provider-azurerm/pull/20003) which creates multiple federated identity credentials sequentially instead of concurrently.  Versions earlier than 3.40.0 can cause failures in pipelines when multiped federated identities are created. We recommend you use [Terraform Provider for Azure (Resource Manager) v3.40.0](https://github.com/hashicorp/terraform-provider-azurerm/tree/main) or later so that multiple federated identity credentials are created sequentially.
+
 When you use automation or Azure Resource Manager templates (ARM templates) to create federated identity credentials under the same parent identity, create the federated credentials sequentially. Federated identity credentials under different managed identities can be created in parallel without any restrictions.
 
-The following Azure Resource Manager template (ARM template) example creates three new federated identity credentials sequentially on a user-assigned managed identity by using the *dependsOn* property: 
+If federated identity credentials are provisioned in a loop, you can [provision them serially](https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/copy-resources#serial-or-parallel) by setting *"mode": "serial"*.
+
+You can also provision multiple new federated identity credential sequentially using the *dependsOn* property. The following Azure Resource Manager template (ARM template) example creates three new federated identity credentials sequentially on a user-assigned managed identity by using the *dependsOn* property:
 
 ```json
 {