My company uses BES Server (wexchange) and approx. 50 or so Nextel BB handheld units. We are merging with another company that does not use BES, but has a couple of users with BB units doing desktop redirection, not sure what the BB units are, but they are not Nextel devices. Once our email systems are one, could we add the random BB users from the other company to our existing BES server? Do all the devices have to be similiar bb units, or can you co-exist with a variety of units? Thanks!