GUID of a task-specific calendar.
Assembly: ProjectServerWebServices (in ProjectServerWebServices.dll)
Read-only. TASK_CAL_UID is null unless a special calendar is used in scheduling the specific task. You can change the assigned task calendar by selecting an available enterprise calendar on the Advanced tab of the Task Information window in Project Professional.
Refers to an enterprise calendar available in Project Server. You can find the enterprise calendars by using ListCalendars.