On BE3K, you have to configure user(s) as an attendant. Navigate to the Users/Phones page and select attendant group. Add specific users that you require use of the CUAC-CE and remember that an additional enhanced license is required for them to run the console. During CUACCE installation, when it asks for operator’s userid and password, that specific user’s userid and password has to be entered. If you give BE3K admin userid and password (common mistake as this is not made clear), then typically this error is seen.