


The VersionOverrides manifest entries specify many things for the add-in, such as the application, types of controls to add to the ribbon, the text, the icons, and any associated functions.

In a client that doesn't support VersionOverrides, existing add-ins will continue to function as they did without add-in commands. This element is an addition to the manifest schema v1.1 that ensures backward compatibility. Creating the add-in commandĪdd-in commands are declared in the add-in manifest in the VersionOverrides element. Using add-in commands if possible is a best practice. However, contextual add-ins can present different commands depending on whether the currently selected item is a message or appointment, and can choose to appear in read or compose scenarios.
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Support for add-in commands in Exchange 2016 requires Cumulative Update 5.Īdd-in commands are only available for add-ins that do not use ItemHasAttachment, ItemHasKnownEntity, or ItemHasRegularExpressionMatch rules to limit the types of items they activate on.
