Mail app manifests
Learn what a manifest does for a mail app in Outlook.
Last modified: May 01, 2015
Applies to: apps for Office | Office Add-ins | Outlook
Learn more about supported hosts and other requirements.
The name "apps for Office" is changing to "Office Add-ins". During the transition, the documentation and the UI of some Office host applications and Visual Studio tools might still use the term "apps for Office".
All app for Office manifests follow the schema for apps for Office manifests. A mail app manifest defines information such as the following:
Mail app support: The type of app is a mail app that requires mailbox support, by Exchange and Outlook
Identification: Mail app name, description, logo, and app version
Contextual activation: The context where this mail app is relevant for the user
Locale and device support: Support for additional locales, tablets, or smartphones
Permissions: Permissions as pertaining to user privacy
When you install a mail app, Exchange stores the app manifest in the user's mailbox. When you start Outlook, Outlook caches the manifests of all your installed mail apps, so that Outlook is ready to surface apps relevant to your context whenever you read or compose a message or appointment. Since mail apps can use different versions of the apps for Office platform and a user's Exchange server and Outlook may not support all available versions of the platform, Exchange and Outlook install and activate only mail apps that they can support.