You configure a calendar as a shadow to synchronize it with a calendar that already contains all exception dates, date ranges, or calculated dates, such as a holiday calendar.
Schedules cannot refer to a calendar located on another EcoStruxure BMS server. You need to create shadow calendars in all EcoStruxure BMS servers that contain schedules that refer to the calendar. In other words, an exception event in a schedule requires the calendar from which the exception event originated to also be present in the shadow device.
In WorkStation, in the System Tree pane, select the calendar you want to configure as a shadow.
On the File menu, click Properties .
In the Calendar properties, in the Lead object box, enter the calendar that you want to synchronize the shadow calendar with.
Click OK .