

If a client does not support the minimum requirement set, it does not load the add-in. Setting a minimum requirement set version in the manifest controls which Outlook client the add-in will appear in.

Not all Outlook clients support the newest set of APIs, but if an Outlook client declares support for a requirement set, generally it supports all of the APIs in that requirement set (check the documentation on a specific API or feature for any exceptions). The Mailbox requirement set has versions, and each new set of APIs that we release belongs to a higher version of the set.

Īll Outlook APIs belong to the Mailbox requirement set. Outlook add-ins always include a Set element with a Name attribute set to Mailbox and a MinVersion attribute set to the minimum API requirement set that supports the add-in's scenarios.įor example, the following manifest snippet indicates a minimum requirement set of 1.1. Outlook add-ins declare what API versions they require by using the Requirements element in their manifest.
