Task catalogs are task containers, where you can categorize your tasks based on various criteria. The catalog in which a task resides is set at task creation using the Create Form Task activity in Studio. The catalog must be defined beforehand in Orchestrator. If you define a catalog which hasn't been created in Orchestrator beforehand, the task is generated in Orchestrator with no catalog. Details here.
Task catalogs cannot be deleted.
Updated 4 months ago