Learn Editor: Update managed-identity.md

Author: pauldotyu

articles/ai-services/openai/how-to/managed-identity.md

@@ -22,8 +22,11 @@ In the following sections, you'll use  the Azure CLI to assign roles, and obtain
 
 - An Azure subscription - <a href="https://azure.microsoft.com/free/cognitive-services" target="_blank">Create one for free</a>
 - Access granted to the Azure OpenAI Service in the desired Azure subscription
+-   Currently, access to this service is granted only by application. You can apply for access to Azure OpenAI by completing the form at [https://aka.ms/oai/access</a>. Open an issue on this repo to contact us if you have an issue.
+
+- [Custom subdomain names are required to enable features like Azure Active Directory (Azure AD) for authentication.](
+/articles/ai-services/cognitive-services-custom-subdomains)
 
-    Currently, access to this service is granted only by application. You can apply for access to Azure OpenAI by completing the form at <a href="https://aka.ms/oai/access" target="_blank">https://aka.ms/oai/access</a>. Open an issue on this repo to contact us if you have an issue.
 - Azure CLI - [Installation Guide](/cli/azure/install-azure-cli)
 - The following Python libraries: os, requests, json
 
@@ -62,15 +65,17 @@ Assigning yourself to the "Cognitive Services User" role will allow you to use y
     ```
 
 4. Make an API call
-Use the access token to authorize your API call by setting the `Authorization` header value.
 
-    ```bash
-    curl ${endpoint%/}/openai/deployments/YOUR_DEPLOYMENT_NAME/completions?api-version=2023-05-15 \
-    -H "Content-Type: application/json" \
-    -H "Authorization: Bearer $accessToken" \
-    -d '{ "prompt": "Once upon a time" }'
-    ```
+Use the access token to authorize your API call by setting the `Authorization` header value.
 
+```yaml
+```bash
+curl ${endpoint%/}/openai/deployments/YOUR_DEPLOYMENT_NAME/completions?api-version=2023-05-15 \
+-H "Content-Type: application/json" \
+-H "Authorization: Bearer $accessToken" \
+-d '{ "prompt": "Once upon a time" }'
+```
+```
 ## Authorize access to managed identities
 
 OpenAI supports Azure Active Directory (Azure AD) authentication with [managed identities for Azure resources](../../../active-directory/managed-identities-azure-resources/overview.md). Managed identities for Azure resources can authorize access to Azure AI services resources using Azure AD credentials from applications running in Azure virtual machines (VMs), function apps, virtual machine scale sets, and other services. By using managed identities for Azure resources together with Azure AD authentication, you can avoid storing credentials with your applications that run in the cloud.  
@@ -86,3 +91,4 @@ Before you can use managed identities for Azure resources to authorize access to
 - [Azure Resource Manager client libraries](../../../active-directory/managed-identities-azure-resources/qs-configure-sdk-windows-vm.md)
 
 For more information about managed identities, see [Managed identities for Azure resources](../../../active-directory/managed-identities-azure-resources/overview.md).
+