Using a OfficeServ 7200 on SVMi-20E VM.

When an incoming call comes into my OfficeServ and the caller dialed a number direct. If that call isn't picked up and caller dials "0" during the greeting, the caller is disconnected. I connected into the voicemail server and discovered that every extension is set to "Goto Operator" on Press 0. When I changed the Press 0 to a known Operator extension in my MMC 601, the call was directed to the Operator properly. Is it possible to setup the default "Operator" to a known extension without having to goto every single extension and change the Press 0 from "Goto Operator" to EXT XXXX?