Managing instant messaging
The BlackBerry® Collaboration Service is designed to provide a connection between your organization's instant messaging server and the collaboration client on BlackBerry devices. In some instant messaging environments, you can use TLS or HTTPS to encrypt the connection between specific instant messaging components.
The BlackBerry Collaboration Service supports up to 2000 connections for instant messaging sessions on the Microsoft® Office Live Communications Server 2005, Microsoft® Office Communications Server 2007, and IBM® Lotus® Sametime® server. The number of connections that the BlackBerry Collaboration Service supports for instant messaging sessions on the Novell® GroupWise® instant messaging server is limited to the number of Windows® sockets that are available.