You can integrate Jive SBS with your instance of Openfire, an XMPP server. In this way, you can create a connection in which IM presence information is visible in Jive SBS. In other words, with the application and Openfire aware of each other, a person "Available" via IM will appear so in the application. To integrate the two, you'll need Jive SBS version 2.0 or higher and Openfire version 3.5.0 or higher.
Admin Console: System > Real-Time > Connection
Also, if you want Openfire to use the application as its source of user data, you'll need to have REST-style web services enabled in Jive SBS. When you use the admin console to create the connection between the application and Openfire, the console will automatically enable REST-style services. Note that this web service access will be enabled for all registered users (technically, Openfire is represented in Jive SBS as a registered user). You can't have Openfire integration without enabling access to the application via REST.