Explanation/Reference:
Explanation:
This is almost a discussion about which came first: the chicken or the egg.
At first glance, I would havesaid that the correct answer is "Configure the Exchange connector on Server3".
However, that answer is not available in this question, leaving only the "Enrollment Proxy Point" as a possible answer.
Note:
How to Install Clients on Mobile Devices and Enroll Them by Using Configuration Manager When you enroll mobile devices by using System Center 2012 Configuration Manager, this action installs the System Center 2012 Configuration Manager client to provide management capabilities that include hardware inventory, software deployment for required applications, settings, and remote wipe.
To enroll these mobile devices, you must use Microsoft Certificate Services with an enterprise certification authority (CA) and the Configuration Manager enrollment point and enrollment proxy point site system roles.
References: How to Install Clients on Mobile Devices and Enroll Them by Using Configuration Manager
http://technet.microsoft.com/en-us/library/gg712327.aspx