I have a BCM 400 4.0 where the customer would like to automate the change of operators from a Hunt Group DN to a single DN between the hours of 10 and 12.

I for the life of me cannot think of a way to automate this. They have a DID going straight to the auto attendant which goes into a CCR tree. I can set up the schedule to play a different prompt and specify a different digit for the operator between those hours, but I don't really consider that acceptable because who really listens to a auto attendant greeting when you are just pressing 0 anyway. I've also considered changing the operator DN and using call forwarding to move the calls around but there is no way to automate that, they would have to manually control it.

Any input would appreciated.

Set up TWO CCR trees. Do NOT make path 0 a MENU NODE, make it a TRANSFER NODE. First CCR answers the call and transfers it to the Hunt group. Second CCR answers calls from 10-12 and transfers to the DN.
If you need an announcement use the Company Greetings. Like: Thank you for calling ABC. Please hold while your call is transferred to our call center.

After the greeting, it hits the CCR which transfers to the group.....or the DN between 10-12.

And if you want to get fancy, make a third CCR for after hours. Set it up with path 0 either as an INFO NODE (Sorry we are closed, goodbye, CLICK) or as a TRANSFER TO VM NODE and send it to the GD (or someones mail box)

Only issue is we are already using a menu ccr tree and need to maintain the other options in the menu.

You have 8 trees to play with.

You can try Scheduled night service configurations. At that particular time the call which is landing on Operators in the hunt group can be changed to a different DN. After the time period we can make the call to land back on the hunt group number when some body dials '0'.