Subtypes Added in Activity History, Events, Looked Up From Activities, Open Activity, and Tasks
|Knowledge Article Number||000228387|
|Description||New subtypes facilitate the standardization of subtypes in Activity History, Events, Looked Up From Activities, Open Activity, and Tasks objects.
The field with api name ActivitySubtype is visible in API version 35.0 and above for the object named AcitivityHistory.
ActivitySubtype—Provides standard subtypes to facilitate creating and searching for specific activity subtypes. This field isn’t updateable.
Winter '16 Release Notes: Changed Objects