On the Optional Features screen, verify that the Enhanced Conferencing field is set to y, if you want to use the Selective Conference Party Display, Drop, and Mute capability and the No Hold Conference capability on your system. If the Enhanced Conferencing field is set to n, your system stops supporting the Selective Conference Party Display, Drop, and Mute capability. Go to the Avaya Support website at http://support.avaya.com for current documentation and knowledge articles related to the Enhanced Conferencing feature, or to open a service request.

To view the Optional Features screen, enter display system-parameters customer-options.