Outlook add-in API requirement set 1.12

The Outlook add-in API subset of the Office JavaScript API includes objects, methods, properties, and events that you can use in an Outlook add-in.

What's new in 1.12?

Requirement set 1.12 includes all of the features of requirement set 1.11. It added the following features.

Added new events for event-based activation.
Added send mode options for add-ins that use the OnMessageSend or OnAppointmentSend event.
Added support to display an error message to the user in event-based activation add-ins.

Added new events for event-based activation: Adds support for the following events.
- OnMessageSend
- OnAppointmentSend
- OnMessageCompose
- OnAppointmentOrganizer
Modified the LaunchEvent manifest element: Adds the SendMode attribute used by the OnMessageSend and OnAppointmentSend events. This attribute specifies options available to the user if an add-in stops an item from being sent or if the add-in is unavailable.
Modified Office.AddinCommands.EventCompletedOptions: Adds the errorMessage property to display a message to the user if allowEvent is set to false when the add-in's event handler condition isn't met.