Your environment consists of the servers shown in the following table.

Users who have mailboxes on Server1 receive an error message when they attempt to synchronize through Exchange ActiveSync.
You need to ensure that all users are able to use Exchange ActiveSync.
What should you do?

A.
Enable Basic authentication on Server1.

B.
Enable Basic authentication on Server2.

C.
Enable Basic authentication on Server3.

D.
Enable Integrated Windows authentication on Server1.

E.
Enable Integrated Windows authentication on Server2.

F.
Enable Integrated Windows authentication on Server3.