Tasks are basically a goner - they have been neglected but won't be removed. But... tasks on smart phones are totally dependent on the available apps as none of the mail apps include tasks. IMO, there are some good apps for apple & android that use exchange tasks (i like ios 3rd party apps better) - not sure about windows phone. TaskTask is the only one i can think of offhand but i don't have phone handy to tell you about others (i think I've tried every task app.)