What are the possible causes when eSpace Desktop fails to initiate an instant conference? (Multiple Choice)
A . The account does not have the right to hold instant conferences.
B . The data conference license has expired.
C . The client function parameters are incorrectly set in the eServer configuration file.
D . Related parameters in the data conference configuration file are incorrectly set.
E . The unified gateway, BMU, and data conference server are not time-synchronized.
Answer: ABDE