You deploy an Exchange Server 2013 organization to a test network for evaluation.
You install the Mailbox server role and the Client Access server role on a server named ex01.contoso.com.
You do not perform any other configurations.
All of the ports from the Internet to ex01.contoso.com are open. You successfully connect to ex01.contoso.com from the Internet and from the internal network.
You need to identify which types of Exchange Server clients will connect successfully to the organization without any further configurations.
What should you identify?