Being set up for OWA is not the same as being set up for ActiveSync. But ActiveSync uses a firewall port that is already open for OWA, so that removes one excuse IT might have not to support ActiveSync. (Not to say that there aren't other valid reasons -- but I'm very fortunate in that the IT folks at my firm have expressed absolute willingness to set things up for me, so I haven't really heard what those other reasons might be.)