PidLidAppointmentSubType Canonical Property

Applies to: Outlook 2013 | Outlook 2016

Specifies whether or not the event is all day.

Associated properties:
Property set:
Long ID (LID):
Data type:


This property specifies whether or not the event is an all-day event, as specified by the user. A value of TRUE indicates that the event is an all-day event, in which case the start time and end time must be midnight so that the duration is a multiple of 24 hours and is at least 24 hours. A value of FALSE or the absence of this property indicates the event is not an all-day event. The client or server must not infer the value as TRUE when a user happens to create an event that is 24 hours, even if the event starts and ends at midnight.

Protocol specifications


Provides property set definitions and references to related Exchange Server protocol specifications.


Specifies the properties and operations for appointment, meeting request, and response messages.

Header files


Provides data type definitions.

See also

MAPI Properties

MAPI Canonical Properties

Mapping Canonical Property Names to MAPI Names

Mapping MAPI Names to Canonical Property Names