Research In Motion has released new Enterprise IM clients for Microsoft Office Communications Server, IBM Lotus Sametime, and Novell GroupWise Messenger. The Enterprise IM nearly resembles BlackBerry Messenger.

BlackBerry enterprise instant messaging clients allow organization’s end users to take their messaging with them while they’re on the go—regardless of the enterprise communication platform they use.

In order to run these IM clients, you must be on a BlackBerry Enterprise Server or it will not work. You can download them from BlackBerry App World:

Thanks @rr_yy!