We are currently running the free Blackberry Enterprise Sever Version 188.8.131.52 with 14 users of 15 avaible. Our cellular service rep recomended we upgrade to Blackberry Professional software because it will allow us to have 30 users over the current 15 without having to buy the full version of BES. Has anyone done this? Is it a good idea? If you have done this any problems you might have had?