20.1.2 How Pop-up Reminders Work

This section describes how pop-up reminders work.

If configured, Instant Messaging pop-up reminders follow this architectural flow:

1. The Instant Messaging JMS subscriber subscribes to Calendar Server events and notifications in the Event Notification Service (ENS).

2. Calendar Server publishes an event or task notification in text/xml or text/calendar format to ENS.

3. The Instant Messaging JMS subscriber receives the calendar event or task notification and then generates a message in text/calendar format.

4. The Instant Messaging server sends the message to the calendar owner, if the end user is online.

5. If the recipient is available, Instant Messenger generates an HTML pop-up reminder on the end user’s desktop based on the message.