After you import users from Cisco Unified Communications Manager Express to Cisco Unity Express, you find that some users are missing. Which two reasons might be causing this problem?

A.	The username has numbers in the name.
B.	The username has spaces in the name.
C.	The ephone is missing the username and password.
D.	The ephone DN does not have the username and password.
E.	The username is longer than 15 characters.
F.	The ephone is not marked as active.