1321970 Be more forceful in stating limits and give example

Author: rcdun

articles/communications-gateway/configure-test-customer-teams-direct-routing.md

@@ -38,11 +38,11 @@ You must be able to sign in to the Microsoft 365 admin center for your test cust
 Azure Communications Gateway has per-region domain names. You need to set up subdomains of these domain names for your test customer. Microsoft Phone System and Azure Communications Gateway use these subdomains to match calls to tenants.
 
 1. Choose a DNS label to identify the test customer.
-    * The label can be up to eight characters in length and can only contain letters, numbers, underscores, and dashes.
+    * The label must be up to **eight** characters in length and can only contain letters, numbers, underscores, and dashes.
     * You must not use wildcard subdomains or subdomains with multiple labels.
     * For example, you could allocate the label `test`.
     > [!IMPORTANT]
-    > The full customer subdomains (including the per-region domain names) must be a maximum of 48 characters. Microsoft Entra ID does not support domain names of more than 48 characters.
+    > The full customer subdomains (including the per-region domain names) must be a maximum of 48 characters. Microsoft Entra ID does not support domain names of more than 48 characters. For example, `contoso1.1-r1.abcdefgh12345678.commsgw.azure.com` is 48 characters.
 1. Use this label to create a subdomain of each per-region domain name for your Azure Communications Gateway.
 1. Make a note of the label you choose and the corresponding subdomains.
 

articles/communications-gateway/interoperability-teams-direct-routing.md

@@ -62,10 +62,10 @@ For each customer, you must:
 
 1. Choose a suitable subdomain. The label for the subdomain must:
     - Contain only letters, numbers, underscores, and dashes.
-    - Be up to eight characters in length.
+    - Be up to **eight** characters in length.
     - Not contain a wildcard or multiple labels separated by `.`.
     > [!IMPORTANT]
-    > The full customer subdomain (including the regional subdomains and the base domain) must be a maximum of 48 characters. Microsoft Entra ID does not support domain names of more than 48 characters.
+    > The full customer subdomain (including the regional subdomains and the base domain) must be a maximum of 48 characters. Microsoft Entra ID does not support domain names of more than 48 characters. For example, `contoso1.1-r1.abcdefgh12345678.commsgw.azure.com` is 48 characters.
 2. Configure Azure Communications Gateway with this information, as part of "account" configuration available over the Provisioning API.
 3. Liaise with the customer to update their tenant with the appropriate subdomain, by following the [Microsoft Teams documentation for registering subdomain names in customer tenants](/microsoftteams/direct-routing-sbc-multiple-tenants#register-a-subdomain-name-in-a-customer-tenant).