The Push Notification plugin adds support for sending push notifications to client software, as described in XEP-0357: "Push Notifications".
Copy pushnotification.jar into the plugins directory of your Openfire installation. The plugin will then be automatically deployed. To upgrade to a new version, copy the new pushnotification.jar file over the existing file.
The plugin can be configured using these Openfire system properties:
Note that push notifications are processed by remote servers that are not part of Openfire. Out of privacy concerns, the inclusion of the author and body of the message for which the push notification is sent is switched off by default.