[cisco-voip] CUBAC Queue Forced Delivery

[Rab]

We're using Cisco Unified Business Attendant Console and would like to enable forced delivery of calls to the operator. I can see the setting under Queue Management but for some reason it's greyed out. If I create a new queue I can select it but I want to enable it on the existing queue. The documentation for CUBAC is poor to say the least. Can anyone explain why the option is unavailable on this single queue in the system?

Thanks.