Merge pull request #11880 from ljbenjamin/patch-2

Update logic-apps-architectures-simple-enterprise-integration.md

Author: GitHubber17

articles/logic-apps/logic-apps-architectures-simple-enterprise-integration.md

@@ -34,7 +34,7 @@ The architecture has the following components:
 - **Azure API Management Developer portal**. Each instance of Azure API Management comes with access to the [Developer portal](https://docs.microsoft.com/azure/api-management/api-management-customize-styles). The API Management Developer portal gives you access to documentation and code samples. You can test APIs in the Developer portal.
 - **Azure Logic Apps**. [Logic Apps](https://docs.microsoft.com/azure/logic-apps/logic-apps-overview) is a serverless platform that's used to build enterprise workflow and integration.
 - **Connectors**. Logic Apps uses [connectors](https://docs.microsoft.com/azure/connectors/apis-list) to connect to commonly used services. Logic Apps already has hundreds of different connectors, but you can also create a custom connector.
-- **IP address**. The Azure API Management service has a fixed public [IP address](https://docs.microsoft.com/azure/virtual-network/virtual-network-ip-addresses-overview-arm) and a domain name. The domain name is a subdomain of azure-api.net, such as contoso.azure-api.net. Logic Apps and Service Bus also have a public IP address. However, in this architecture, we restrict access for calling Logic Apps endpoints to only the IP address of API Management (for security). Calls to Service Bus are secured by a shared access signature (SAS).
+- **IP address**. The Azure API Management service has a fixed public [IP address](https://docs.microsoft.com/azure/virtual-network/virtual-network-ip-addresses-overview-arm) and a domain name. The default domain name is a subdomain of azure-api.net, such as contoso.azure-api.net, but [custom domains](https://docs.microsoft.com/azure/api-management/configure-custom-domain) can also be configured. Logic Apps and Service Bus also have a public IP address. However, in this architecture, we restrict access for calling Logic Apps endpoints to only the IP address of API Management (for security). Calls to Service Bus are secured by a shared access signature (SAS).
 - **Azure DNS**. [Azure DNS](https://docs.microsoft.com/azure/dns/) is a hosting service for DNS domains. Azure DNS provides name resolution by using the Microsoft Azure infrastructure. By hosting your domains in Azure, you can manage your DNS records by using the same credentials, APIs, tools, and billing that you use for your other Azure services. To use a custom domain name like contoso.com, create DNS records that map the custom domain name to the IP address. For more information, see [Configure a custom domain name in API Management](https://docs.microsoft.com/en-us/azure/api-management/configure-custom-domain).
 - **Azure Active Directory (Azure AD)**. Use [Azure AD](https://docs.microsoft.com/azure/active-directory/) or another identity provider for authentication. Azure AD provides authentication for accessing API endpoints by passing a [JSON Web Token for API Management](https://docs.microsoft.com/azure/api-management/policies/authorize-request-based-on-jwt-claims) to validate. Azure AD can secure access to the API Management Developer portal (Standard and Premium tiers only).