You need to prevent a user named User1 from using Outlook Web App (OWA) to access his mailbox.
You need to ensure that User1 can connect her device by using Exchange ActiveSync.
Which record should you create in the external DNS zone?
You need to configure the namespaces for the OWA virtual directories.
You need to ensure that the users are NOT required to type their domain name when they log on.
Which tool should you use?
What should you modify?
What Should you modify?