my colleagues and i all work in the same place but thier devices received email every 20 min or so(normal) mine took over 2 hours to get some of the same emails today, last week it happened and it took over 3.5 hours on a particular day. i have a tour and the rest of them have-storms x2-tour x1-8830 x3-curve x2. what could cause this? we are on bis/owa.