The long-awaited and much anticipated BlackBerry Enterprise Server 4.1 SP5, set for a general availability release on Friday, February 29, will be the first major release of the enterprise mobile messaging solution from Research In Motion to include a vast number of end-user feature enhancements and management utilities to help with reducing the total cost of ownership of your BlackBerry deployment. Today, Research In Motion held a webcast that reviewed what will be available in…