Quirk with Business Schedules and Ring Group on MiVB?

Tried to create a business schedule, and apply to call reroute always. Whenever I would call the ring group, it would not adhere to the business schedule and default to system schedule. Discovered that it wasn't until I entered a zone ID on the ring group extension would the business schedule work properly. When I used "SCHEDULE DISPLAY DN" maint command on the ring group extension, it would just respond back with "DN:1000" with no other information. Once I entered the zone ID, running the same command actually showed more information and that the correct business schedule was applied.

According to documentation, "With no zone ID assigned to the Ring Group, the system applies the business schedule using the zone ID (and related time zone) assigned to the host MiVoice Business."

Where is this setting???