Update phone-numbers-az-cli.md

Adding a note to the CLI quickstart mentioning that it does not include functionalities such as search, purchase, edit and release phone numbers.

Author: sorrego-msft

articles/communication-services/quickstarts/telephony/includes/phone-numbers-az-cli.md

@@ -43,6 +43,8 @@ Make these replacements in the code:
 - Replace `<purchasedPhoneNumber>` with a phone number that's associated with your Communication Services resource.
 - Replace `<yourConnectionString>` with your connection string.
 
+**Note:** The Azure CLI option provides functionality only for listing and showing phone numbers. It does not support other operations such as searching, purchasing, editing or releasing phone numbers.
+
 ### (Optional) Use Azure CLI phone numbers operations without passing in a connection string
 
 You can configure the `AZURE_COMMUNICATION_CONNECTION_STRING` environment variable to use Azure CLI phone numbers operations without having to use `--connection_string` to pass in the connection string. To configure an environment variable, open a console window and select your operating system from the below tabs. Replace `<yourConnectionString>` with your actual connection string.
@@ -77,4 +79,4 @@ export AZURE_COMMUNICATION_CONNECTION_STRING="<yourConnectionString>"
 
 After you add the environment variable, run `source ~/.bash_profile` from your console window to make the changes effective. If you created the environment variable with your IDE open, you may need to close and reopen the editor, IDE, or shell in order to access the variable.
 
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