The administrator issues notices to users through the form of announcements, such as the latest software and patch installation notices, etc. Which of the following options is wrong?
A . You can issue an announcement by department.
B . The endpoint must have proxy client installed to receive announcements.
C . If the system issues an announcement and the proxy client is not online, it will not receive the announcement information after going online.
D . You can issue an announcement by account number.
Answer: C